fix: update background to CloudEvent conversion (GoogleCloudPlatform#73)

fix: allows json body with binary event (GoogleCloudPlatform#63)

feat: add better handling for exceptions (GoogleCloudPlatform#62)

docs: adds CloudEvent helloworld to examples, README, and tests (Goog…

…leCloudPlatform#55)

fix: better type-handing in Context class (GoogleCloudPlatform#47)

test: use github actions (GoogleCloudPlatform#41)

feat: uses guzzle/psr and psr-7 instead of http-foundation (GoogleClo…

…udPlatform#28)

Adjust path handling for robots.txt and favicon.ico (GoogleCloudPlatf…

…orm#25)

Add config defaults (GoogleCloudPlatform#19)

Prepare for 0.1 Release (GoogleCloudPlatform#11)