Add ESLint, Prettier & fix issue with CommenJS get loaded as ES Module (

#14)

* Add ESLint, fix issue with load the lib.common.js as ES Module, just change the filetype to cjs
* Add .yarn to be ignored from lint
* Address ES module error issue

* Bump up Bootstrap Icons to v1.11.3

Correct package version

Upgrade bootstrap-icons to v1.10.3

Upgrade to 1.8.1

Upgrade bootstrap-icons to v1.7.2

Reorganise README and add section about BootstrapVue

Upgrade bootstrap-icons to v1.4.0

Fixes #2

Upgrade to bootstrap-icons v1.3.0

Add /*#__PURE__*/ annotations to hint Terser for tree-shaking

Webpack is more conservative in terms of dead code elimination
compared to Rollup, which causes it to bundle all the icons even
when they are not used. This patch annotate the `genIcon` and
`Object.keys` function as pure to give Terser a hint that it is
in fact side effect free.

Closes #1.

Upgrade to bootstrap-icons v1.2.2