Update glean-parser requirement from ~=19.2.0 to ~=20.0.0

[dependabot]

Updates the requirements on glean-parser to permit the latest version.

Release notes

Sourced from glean-parser's releases.

v20.0.0

20.0.0

• BREAKING CHANGE: Go server: replaced the go_server_pubsub outputter with a transport option on go_server (-s transport=logging|pubsub|combined, default logging); combined emits both transports in one file and ping params gain an optional DocumentID to share a document_id across them for gradual migration (#849)
• Add support for Glean session implementation (#840)

Changelog

Sourced from glean-parser's changelog.

20.0.0

• BREAKING CHANGE: Go server: replaced the go_server_pubsub outputter with a transport option on go_server (-s transport=logging|pubsub|combined, default logging); combined emits both transports in one file and ping params gain an optional DocumentID to share a document_id across them for gradual migration (#849)
• Add support for Glean session implementation (#840)

19.2.0

• Go server template: add go_server_pubsub outputter to support direct Pub/Sub delivery (DENG-9533)

19.1.1

• Use JSON serialization for on-disk caching

19.1.0

• Go server: Add support for labeled_boolean metrics with static labels (AE-1250)
• BUGFIX: Go server: Serialize nil string_list metrics as empty arrays instead of null (#837)
• Add support to target glean_sym (the new experimental Glean Rust API) (#841)

19.0.0

• Python server: Support optional metrics (#828)
• BUGFIX: Correct event timestamp values in server language templates (#831)
• Remove the coverage subcommand. The SDK also removed metric testing covergae (#832)

18.2.0

• New lint: Warn against event metrics on the metrics or baseline ping (#823)
• Go server: Add 'string_list' to supported metric types (#825)

18.1.1

• Python server: Fix logging mechanism (#820)

18.1.0

• Python server: Support sending custom pings without events (#817)
• Python server: Add 'object' and 'boolean' to supported metric types (#816)
• Kotlin: Avoid toString() conversion on strings (#818)

18.0.6

• Swift: Rely on Swift's Codable and configure it properly for the expected serialization (#815)

18.0.5

• BUGFIX: Kotlin: correctly build a serial descriptor

18.0.4

... (truncated)

Commits

• 07fb910 Release v20.0.0
• 27ce540 Release v19.3.0
• b953370 go_server: unify logging and Pub/Sub behind a transport option (#849)
• 0c0ce2c Bug2020962 session impl (#840)
• See full diff in compare view

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