update publish docs script

.npmignore

@@ -0,0 +1 @@
+src

publish_docs.sh

@@ -1,9 +1,8 @@
-#!/bin/bash
-
 yarn docs
 cd docs
 git init .
 git remote add origin git://github.com/gamestdio/mathf.git
 git checkout -b docs
 git add .
+git commit -m "update docs"
 git push origin docs:gh-pages