Release App Engine golang SDK v2.0.2

What's Changed

• Add Go 1.16 to tested Go versions by @lukasberger in #255
• switch default logStream from stdout to stderr by @zevdg in #272
• Fix header name to associate log entry & trace by @pokutuna in #263
• refactor: pin setup-gcloud gh action to v0 by @KaylaNguyen in #274
• Fix golang/appengine CI by @bsiegert in #280
• run gofmt with go1.19 release candidate by @zevdg in #282
• respect GAE_ENV=localdev by @zevdg in #283
• prevent github from cancelling all test jobs when one fails by @zevdg in #285
• allow API calls without GAE context by @zevdg in #284
• Security Vulnerability Upgrading golang.org/x/text by @ybocalandro in #287

New Contributors

• @pokutuna made their first contribution in #263
• @bsiegert made their first contribution in #280
• @ybocalandro made their first contribution in #287

Full Changelog: v2.0.1...v2.0.2