1.0.0: Unique given sources, BZ2

The first major release includes final touches to the packaged ZIP file.

• Merged PR #5: Unique given sources, preventing them being added to the
  ZIP file twice
  (@thekid)
• Also support bzip2 compression if PHP extension is loaded, but keep
  preference on gzip, which has performed better in my tests.
  (@thekid)

0.7.0: Runtime versioning

• Fixed issue #3: Context object compatibility. Context now also declares
  the properties logGroupName and logStreamName like in NodeJS, and
  uses memoryLimitInMB instead of memorySize.
  (@thekid)
• Merged PR #4: Pass version along to docker images. Use xp lambda runtime
  to use the current PHP version, xp lambda runtime:8.0 to use the newest
  PHP 8.0 release, and xp lambda runtime:8.0.10 for version pinning.
  (@thekid)
• Ignore any directories inside src/test and src/it as well any hidden
  directories when packaging.
  (@thekid)

0.6.0: Shrink runtime layer

• Decreased size of runtime layer from ~8.4 MB to ~2.4 MB by using strip
  and zip -9, reducing layer publishing time as well as initialization duration
  https://stackoverflow.com/questions/4179010/how-to-strip-executables-thoroughly

0.5.0: Deployment file name

• Renamed task.zip to function.zip in order not to introduce more
  vocabulary than necessary
  (@thekid)

0.4.0: Test subcommand

• Renamed xp lambda invoke to xp lambda test to make clear we're
  not invoking the deployed lambda
  (@thekid)

0.3.0: Packaging

• Implemented xp lambda package subcommand for packaging lambda code
  including the src and vendor directories as requested in issue #2
  (@thekid)
• Renamed context member payload to payloadLength - @thekid

0.2.0: Environment fix

• Fixed environment passed to execution context - @thekid
• Made it possible to trigger a runtime rebuild via -b - @thekid

0.1.0: Initial release

• Hello World! First release - @thekid