upgrade packages, fix node 8.5 / 8.6 bug & format code

Matthias Wirtzrequested to merge
(removed):master into master

From Iteration Plan for January 2019

  • vsce should block publishing extensions that use vscode as a dependency (should always be a devDependency) Microsoft/vscode-vsce#319

Fixes #23 (closed)

Code format (ESLint / Prettier)

Shrinks Package Size!

Update Dependencies

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