Build: remove dependencies from git; track with package-lock.json

- Also update all dependencies
- Concerns about shrinkwrap/package-lock are outdated. If there are issues,
  we can address them.

Close gh-76

Author: timmywil

.gitignore

@@ -1,2 +1,2 @@
+/node_modules
 test-*.sh
-package-lock.json