docs: update readme

README.md

@@ -3,6 +3,8 @@
 
 An utility package exporting gulp tasks for Kendo UI NPM packages.
 
- - `gulp test` - runs the tests (single run);
+ - `gulp test` - runs the tests (single run). `gulp test --tests="test/foo.js"` - runs specific test;
  - `gulp watch-test` - runs the tests in continuous mode;
+ - `gulp e2e` - runs the e2e tests (single run). `gulp e2e --tests="e2e/foo.js"` - runs specific e2e test;
+ - `gulp watch-e2e` - runs the e2e tests in continuous mode;
  - `gulp build-npm-package` - packages the component in a format suitable for publishing as an NPM package (commonjs module)