adding npm shortcuts

Author: tim-kos

Makefile

@@ -3,5 +3,20 @@ SHELL := /bin/bash
 test:
 	@node test/runner.js
 
+release-major: test
+	npm version major -m "Release %s"
+	git push
+	npm publish
+
+release-minor: test
+	npm version minor -m "Release %s"
+	git push
+	npm publish
+
+release-patch: test
+	npm version patch -m "Release %s"
+	git push
+	npm publish
+
 .PHONY: test