build: publish build tools on github (#5458)

* Publishes the material2-build-tools on Github.

gulpfile.js

@@ -7,19 +7,10 @@
 const path = require('path');
 
 const tsconfigPath = path.join(__dirname, 'tools/gulp/tsconfig.json');
-const tsconfig = require(tsconfigPath);
 
 // Register TS compilation.
 require('ts-node').register({
   project: tsconfigPath
 });
 
-// The gulp tsconfig file maps specific imports to relative paths. In combination with ts-node
-// this doesn't work because the JavaScript output will still refer to the imports instead of
-// to the relative path. Tsconfig-paths can be used to support path mapping inside of Node.
-require("tsconfig-paths").register({
-  baseUrl: path.dirname(tsconfigPath),
-  paths: tsconfig.compilerOptions.paths
-});
-
 require('./tools/gulp/gulpfile');