chore(package): add package-lock.json (obs-websocket-community-projects#153)

Our CI builds can randomly begin to fail due to dependencies updating out from under us unexpectedly. Committing our `package-lock.json` to git will help reduce this, by ensuring our CI builds use the exact dependencies we expect.

Author: The-Clockmaker

.gitignore

@@ -18,9 +18,6 @@ npm-debug.log*
 coverage
 .nyc_output
 
-# Until npm5 package-locks are more reliable.
-package-lock.json
-
 # Allow web-tester's dist
 !samples/web-tester/dist