v4.0.0-0

• Breaking change: Now requires at least Node.js 12.x (somewhat following the LTS of Node.js itself)
• Dependencies: Moved from 2.x to modern 4.x version of chalk
• Dependencies: Now using meow instead of dashdash to parse the CLI input
• Dependencies: Uses new 4.x version of installed-check-core, containing fewer dependencies that are more modern and eg. typed and async in themselves
• Internal: Added strict type checking (using Typescript) verifying that the javascript code doesn't violate any assumptions.

v3.0.0...v4.0.0-0