chore: remove old Travis CI badge and update .npmignore (#242)

* chore: remove old Travis CI badge

* chore: update npmignore dotfile

* Update README.md

Co-authored-by: Michaël De Boey <info@michaeldeboey.be>

.npmignore

@@ -2,10 +2,12 @@ node_modules
 .idea
 __tests__
 .npmignore
-.travis.yml
 .eslintrc.json
 docs
 coverage
 .github
 CONTRIBUTING.md
 CODE_OF_CONDUCT.md
+.husky
+.editorconfig
+.prettierignore

README.md

@@ -2,7 +2,7 @@
 
 Enforce best practices for JavaScript promises.
 
-[![travis-ci](https://travis-ci.org/xjamundx/eslint-plugin-promise.svg)](https://travis-ci.org/xjamundx/eslint-plugin-promise)
+[![CI](https://github.com/eslint-community/eslint-plugin-promise/actions/workflows/CI.yml/badge.svg)](https://github.com/eslint-community/eslint-plugin-promise/actions/workflows/CI.yml)
 [![npm version](https://badge.fury.io/js/eslint-plugin-promise.svg)](https://www.npmjs.com/package/eslint-plugin-promise)
 [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)