Update .npmignore to ignore postcss.config.js

Also ignore a styleguide and a few others

Close #417

Author: nikolaik

.npmignore

@@ -1,11 +1,16 @@
-node_modules/
-.DS_Store
-*.log
-.gitignore
-.gitattributes
 .git/
+.github/
+.vscode/
 demo/
+node_modules/
+styleguide/
 webpack/
-yarn.lock.js
-.postcssconfig
 .babelrc
+.DS_Store
+.eslintrc.js
+.gitattributes
+.gitignore
+*.log
+postcss.config.js
+styleguide.config.js
+yarn.lock