diff --git a/Pipfile.lock b/Pipfile.lock
index 7766940..ce70785 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -86,7 +86,6 @@
                 "sha256:f8d6f8db88049a699817fd9178782867bf22283e3813064302ac59f61d95be05",
                 "sha256:fd34fbbfbc40628200730bc1febe30631347103fc8d3d4fa012c21ab9c11eca9"
             ],
-            "markers": "python_version >= '3.6'",
             "version": "==1.3.1"
         },
         "matplotlib": {
@@ -155,53 +154,52 @@
                 "sha256:5fad80b613c402d5b7df7bd84812548b2a61e9977387a80a5fc5c396492b13c9",
                 "sha256:b236cde0ac9a6aedd5e3c34517b423cd4fd97ef723849da6b0d2231142d89c00"
             ],
-            "markers": "python_version >= '2.6'",
             "version": "==5.5.1"
         },
         "pillow": {
             "hashes": [
-                "sha256:165c88bc9d8dba670110c689e3cc5c71dbe4bfb984ffa7cbebf1fac9554071d6",
-                "sha256:1d208e670abfeb41b6143537a681299ef86e92d2a3dac299d3cd6830d5c7bded",
-                "sha256:22d070ca2e60c99929ef274cfced04294d2368193e935c5d6febfd8b601bf865",
-                "sha256:2353834b2c49b95e1313fb34edf18fca4d57446675d05298bb694bca4b194174",
-                "sha256:39725acf2d2e9c17356e6835dccebe7a697db55f25a09207e38b835d5e1bc032",
-                "sha256:3de6b2ee4f78c6b3d89d184ade5d8fa68af0848f9b6b6da2b9ab7943ec46971a",
-                "sha256:47c0d93ee9c8b181f353dbead6530b26980fe4f5485aa18be8f1fd3c3cbc685e",
-                "sha256:5e2fe3bb2363b862671eba632537cd3a823847db4d98be95690b7e382f3d6378",
-                "sha256:604815c55fd92e735f9738f65dabf4edc3e79f88541c221d292faec1904a4b17",
-                "sha256:6c5275bd82711cd3dcd0af8ce0bb99113ae8911fc2952805f1d012de7d600a4c",
-                "sha256:731ca5aabe9085160cf68b2dbef95fc1991015bc0a3a6ea46a371ab88f3d0913",
-                "sha256:7612520e5e1a371d77e1d1ca3a3ee6227eef00d0a9cddb4ef7ecb0b7396eddf7",
-                "sha256:7916cbc94f1c6b1301ac04510d0881b9e9feb20ae34094d3615a8a7c3db0dcc0",
-                "sha256:81c3fa9a75d9f1afafdb916d5995633f319db09bd773cb56b8e39f1e98d90820",
-                "sha256:887668e792b7edbfb1d3c9d8b5d8c859269a0f0eba4dda562adb95500f60dbba",
-                "sha256:93a473b53cc6e0b3ce6bf51b1b95b7b1e7e6084be3a07e40f79b42e83503fbf2",
-                "sha256:96d4dc103d1a0fa6d47c6c55a47de5f5dafd5ef0114fa10c85a1fd8e0216284b",
-                "sha256:a3d3e086474ef12ef13d42e5f9b7bbf09d39cf6bd4940f982263d6954b13f6a9",
-                "sha256:b02a0b9f332086657852b1f7cb380f6a42403a6d9c42a4c34a561aa4530d5234",
-                "sha256:b09e10ec453de97f9a23a5aa5e30b334195e8d2ddd1ce76cc32e52ba63c8b31d",
-                "sha256:b6f00ad5ebe846cc91763b1d0c6d30a8042e02b2316e27b05de04fa6ec831ec5",
-                "sha256:bba80df38cfc17f490ec651c73bb37cd896bc2400cfba27d078c2135223c1206",
-                "sha256:c3d911614b008e8a576b8e5303e3db29224b455d3d66d1b2848ba6ca83f9ece9",
-                "sha256:ca20739e303254287138234485579b28cb0d524401f83d5129b5ff9d606cb0a8",
-                "sha256:cb192176b477d49b0a327b2a5a4979552b7a58cd42037034316b8018ac3ebb59",
-                "sha256:cdbbe7dff4a677fb555a54f9bc0450f2a21a93c5ba2b44e09e54fcb72d2bd13d",
-                "sha256:cf6e33d92b1526190a1de904df21663c46a456758c0424e4f947ae9aa6088bf7",
-                "sha256:d355502dce85ade85a2511b40b4c61a128902f246504f7de29bbeec1ae27933a",
-                "sha256:d673c4990acd016229a5c1c4ee8a9e6d8f481b27ade5fc3d95938697fa443ce0",
-                "sha256:dc577f4cfdda354db3ae37a572428a90ffdbe4e51eda7849bf442fb803f09c9b",
-                "sha256:dd9eef866c70d2cbbea1ae58134eaffda0d4bfea403025f4db6859724b18ab3d",
-                "sha256:f50e7a98b0453f39000619d845be8b06e611e56ee6e8186f7f60c3b1e2f0feae"
+                "sha256:01bb0a34f1a6689b138c0089d670ae2e8f886d2666a9b2f2019031abdea673c4",
+                "sha256:07872f1d8421db5a3fe770f7480835e5e90fddb58f36c216d4a2ac0d594de474",
+                "sha256:1022f8f6dc3c5b0dcf928f1c49ba2ac73051f576af100d57776e2b65c1f76a8d",
+                "sha256:14415e9e28410232370615dbde0cf0a00e526f522f665460344a5b96973a3086",
+                "sha256:172acfaf00434a28dddfe592d83f2980e22e63c769ff4a448ddf7b7a38ffd165",
+                "sha256:1c5e3c36f02c815766ae9dd91899b1c5b4652f2a37b7a51609f3bd467c0f11fb",
+                "sha256:292f2aa1ae5c5c1451cb4b558addb88c257411d3fd71c6cf45562911baffc979",
+                "sha256:2a40d7d4b17db87f5b9a1efc0aff56000e1d0d5ece415090c102aafa0ccbe858",
+                "sha256:2f0d7034d5faae9a8d1019d152ede924f653df2ce77d3bba4ce62cd21b5f94ae",
+                "sha256:33fdbd4f5608c852d97264f9d2e3b54e9e9959083d008145175b86100b275e5b",
+                "sha256:3b13d89d97b551e02549d1f0edf22bed6acfd6fd2e888cd1e9a953bf215f0e81",
+                "sha256:3e759bcc03d6f39bc751e56d86bc87252b9a21c689a27c5ed753717a87d53a5b",
+                "sha256:3ec87bd1248b23a2e4e19e774367fbe30fddc73913edc5f9b37470624f55dc1f",
+                "sha256:436b0a2dd9fe3f7aa6a444af6bdf53c1eb8f5ced9ea3ef104daa83f0ea18e7bc",
+                "sha256:43b3c859912e8bf754b3c5142df624794b18eb7ae07cfeddc917e1a9406a3ef2",
+                "sha256:4fe74636ee71c57a7f65d7b21a9f127d842b4fb75511e5d256ace258826eb352",
+                "sha256:59445af66b59cc39530b4f810776928d75e95f41e945f0c32a3de4aceb93c15d",
+                "sha256:69da5b1d7102a61ce9b45deb2920a2012d52fd8f4201495ea9411d0071b0ec22",
+                "sha256:7094bbdecb95ebe53166e4c12cf5e28310c2b550b08c07c5dc15433898e2238e",
+                "sha256:8211cac9bf10461f9e33fe9a3af6c5131f3fdd0d10672afc2abb2c70cf95c5ca",
+                "sha256:8cf77e458bd996dc85455f10fe443c0c946f5b13253773439bcbec08aa1aebc2",
+                "sha256:924fc33cb4acaf6267b8ca3b8f1922620d57a28470d5e4f49672cea9a841eb08",
+                "sha256:99ce3333b40b7a4435e0a18baad468d44ab118a4b1da0af0a888893d03253f1d",
+                "sha256:a7d690b2c5f7e4a932374615fedceb1e305d2dd5363c1de15961725fe10e7d16",
+                "sha256:b9af590adc1e46898a1276527f3cfe2da8048ae43fbbf9b1bf9395f6c99d9b47",
+                "sha256:bb18422ad00c1fecc731d06592e99c3be2c634da19e26942ba2f13d805005cf2",
+                "sha256:c10af40ee2f1a99e1ae755ab1f773916e8bca3364029a042cd9161c400416bd8",
+                "sha256:c143c409e7bc1db784471fe9d0bf95f37c4458e879ad84cfae640cb74ee11a26",
+                "sha256:c448d2b335e21951416a30cd48d35588d122a912d5fe9e41900afacecc7d21a1",
+                "sha256:d30f30c044bdc0ab8f3924e1eeaac87e0ff8a27e87369c5cac4064b6ec78fd83",
+                "sha256:df534e64d4f3e84e8f1e1a37da3f541555d947c1c1c09b32178537f0f243f69d",
+                "sha256:f6fc18f9c9c7959bf58e6faf801d14fafb6d4717faaf6f79a68c8bb2a13dcf20",
+                "sha256:ff83dfeb04c98bb3e7948f876c17513a34e9a19fd92e292288649164924c1b39"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==8.1.0"
+            "index": "pypi",
+            "version": "==8.1.1"
         },
         "pipenv": {
             "hashes": [
                 "sha256:4ab2f60742184d851ac44b9e1d423afe71dc2ea7a68bde07eb890c8b4ce5a420",
                 "sha256:8253fe6f9cfb3791a54da8a0571f73c918cb3457dd908684c1800a13a06ec4c1"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2020.11.15"
         },
         "pipenv-to-requirements": {
@@ -217,7 +215,6 @@
                 "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
                 "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
             ],
-            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
         "python-dateutil": {
@@ -225,7 +222,6 @@
                 "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c",
                 "sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.8.1"
         },
         "six": {
@@ -233,23 +229,20 @@
                 "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
                 "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.15.0"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:147b43894e51dd6bba882cf9c282447f780e2251cd35172403745fc381a0a80d",
-                "sha256:2be72df684b74df0ea47679a7df93fd0e04e72520022c57b479d8f881485dbe3"
+                "sha256:49ec4eb4c224c6f7dd81bb6d0a28a09ecae5894f4e593c89b0db0885f565a107",
+                "sha256:83f95875d382c7abafe06bd2a4cdd1b363e1bb77e02f155ebe8ac082a916b37c"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.4.2"
+            "version": "==20.4.3"
         },
         "virtualenv-clone": {
             "hashes": [
                 "sha256:07e74418b7cc64f4fda987bf5bc71ebd59af27a7bc9e8a8ee9fd54b1f2390a27",
                 "sha256:665e48dd54c84b98b71a657acb49104c54e7652bce9c1c4f6c6976ed4c827a29"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.5.4"
         },
         "xlsxwriter": {
diff --git a/requirements.txt b/requirements.txt
index 0232640..ce1bc53 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,30 +1,19 @@
-################################################################################
-# This requirements file has been automatically generated from `Pipfile` with
-# `pipenv-to-requirements`
-#
-#
-# This has been done to maintain backward compatibility with tools and services
-# that do not support `Pipfile` yet.
-#
-# Do NOT edit it directly, use `pipenv install [-d]` to modify `Pipfile` and
-# `Pipfile.lock` and then regenerate `requirements*.txt`.
-################################################################################
-
+-i https://pypi.org/simple/
 appdirs==1.4.4
 certifi==2020.12.5
 cycler==0.10.0
 distlib==0.3.1
 filelock==3.0.12
-kiwisolver==1.3.1 ; python_version >= '3.6'
+kiwisolver==1.3.1
 matplotlib==3.3.4
 numpy==1.20.1
-pbr==5.5.1 ; python_version >= '2.6'
-pillow==8.1.0 ; python_version >= '3.6'
+pbr==5.5.1
+pillow==8.1.1
 pipenv-to-requirements==0.9.0
-pipenv==2020.11.15 ; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-pyparsing==2.4.7 ; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
-python-dateutil==2.8.1 ; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-six==1.15.0 ; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-virtualenv-clone==0.5.4 ; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-virtualenv==20.4.2 ; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+pipenv==2020.11.15
+pyparsing==2.4.7
+python-dateutil==2.8.1
+six==1.15.0
+virtualenv-clone==0.5.4
+virtualenv==20.4.3
 xlsxwriter==1.3.7