fix(cli): git-ignore all "dist*" dirs in scaffolded projects

Fix the project template to configure Git to ignore all dist files
created by the TypeScript compiler, e.g. `dist8` for Node.js 8.x and
`dist10` for Node.js 10.x

Before this change, only the directory `dist` was ignored.

Author: bajtos

packages/cli/generators/project/templates/_.gitignore

@@ -61,4 +61,4 @@ typings/
 api-docs/
 
 # Transpiled JavaScript files from Typescript
-dist/
+/dist*/