chore(project): don't bundle lib directory

Should use utilities via destructuring of main import instead.

CJS example:

var { keys } = require('min-dash');

ES example:

import {
  keys
} from 'min-dash';

BREAKING CHANGE:

* you MUST use utilities via main import now

.npmignore

@@ -1,4 +1,5 @@
 test
+lib
 .babelrc
 .eslintignore
 .eslintrc