update: add GH webhook event check for "installation" type events

• update: add GH webhook event check for "installation" type events

Enabled by default, installation type events get triggered when the associated GH application is installed into an organization or repository. By extracting the current scheduled task to the GitHub helper, we can call this arbitrarily when there are new installations as well as handle catch-up on a regular schedule.

Resolves #140 (closed)

requested review from @malowe

added 1 commit

• 8a8d7e3f - update: add GH webhook event check for "installation" type events

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added 1 commit

• 5b7f74ed - fix(gh): remove doubled umport of GithubHelper in webhook resource class

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requested review from @gnugomez

LGTM

merged

mentioned in commit f5e13915