Maintenance update

Exports

Main change is about module exports and file structure
Separate internal files in package are gone (e.g. war3-model/mdx/parse)
Instead package now provides multiple ways to use it:

• Common-js way
• ES Module way
• Direct browser usage with globals and es-modules

Also instead of providing full-size js & ts in package there are now full js and small typings for ts

Fixes

Infinite loop in mdl parse

Deps & infra

• gl-matrix 2 -> 3
• Typescript 1? -> 4.4
• tslint -> eslint
• browserify -> rollup & webpack
• codemirror -> monaco

war3-model requires the same node.js@4, nothing changed here

Other

• Better package.json with more infos
• Better docs