global enhancements

- create context object and remove github one
- more tests and improve mocks

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/index.ts

@@ -1,6 +0,0 @@
-export * as buildkit from './buildkit';
-export * as buildx from './buildx';
-export * as docker from './docker';
-export * as git from './git';
-export * as github from './github';
-export * as util from './util';