Bootstrap extendable

Adding more helper classes for bootstrap 4.

Usage

Using scss

// import bootsrap
@import '~bootstrap-extendable/scss/bootstrap-extendable';
// or
@import '/node_modules/bootstrap-extendable/dist/bootstrap-extendable';

Or using css

/* then import bootsrap */
@import url('/node_modules/bootstrap-extendable/dist/bootstrap-extendable.min.css');