remove copying bootstrap/fontawesome from copying over and just have less use the version in node_modules

xclap.ts

@@ -8,8 +8,9 @@ load({
   clean: exec('rimraf public coverage vendor'),
   'clean:webpack': exec('rimraf dist'),
   eslint: exec('eslint src . --fix'),
+  less: exec('lessc assets/less/app.less public/css/app.css'),
   lint: ['prettier', 'eslint'],
-  postinstall: ['clean', exec('gulp postinstall')],
+  postinstall: ['clean', exec('gulp postinstall'), 'less'],
   prettier: [exec('prettier --write .')],
   test: ['build', 'lint', 'test-jest', 'test-js'],
   'test-jest': [exec('jest --clearCache'), exec('jest --verbose --coverage')],