Stop Silently Failing

[jpoon]

Fixes:

• Stop silently failing. Either display error to user or throw back to vscode to handle.
• Update npm packages
• Fix deleting matching braces on overlapped transformations
• Fix gulp patch|minor|major commands. Only create a git tag once.

Refactor:

• Moving logic away from modehandler -- moving vimstate dispose to vimstate, using anonymous function for text transformation instead of having the code twice.