Merge pull request kubernetes-client#396 from brendandburns/validate

Fix watch to emit an error twice on error. Add tests.

Merge pull request kubernetes-client#354 from brendandburns/headers

Fix a bug if the headers array is null or undefined in exec auth.

Merge pull request kubernetes-client#346 from brendandburns/package

Fix packaging.

Merge pull request kubernetes-client#277 from brendandburns/informer

Add basic informer functionality.

Merge pull request kubernetes-client#275 from silasbw/request-fix0

Fix request import in log.ts

Merge pull request kubernetes-client#272 from brendandburns/master

Fix example code in README.

Update the package build script.

Merge pull request kubernetes-client#257 from drubin/add-husky

Add pre-push check for tests and linter

Merge pull request kubernetes-client#253 from brendandburns/release

Rev to version 0.9.0

Fix script.