Exclude test environments from Sentry reporting (#140)

* Exclude test env from Sentry

* Update Sentry config to not send events when process.env.E2E is true

* Update Sentry config to not send events during testing

* Remove unneeded NODE_ENV configs when running jest test commands

Author: derekblank

src/index.ts

@@ -29,7 +29,8 @@ import { stopAllServersOnQuit } from './site-server'; // eslint-disable-line imp
 Sentry.init( {
 	dsn: 'https://97693275b2716fb95048c6d12f4318cf@o248881.ingest.sentry.io/4506612776501248',
 	debug: true,
-	enabled: process.env.NODE_ENV !== 'development',
+	enabled:
+		process.env.NODE_ENV !== 'development' && process.env.NODE_ENV !== 'test' && ! process.env.E2E,
 	release: app.getVersion() ? app.getVersion() : COMMIT_HASH,
 } );