Updating dependencies, especially Rollup and TypeScript

[ChristianIvicevic]

Are there any plans to update this package properly to the newest versions of the various dependencies? By doing so manually I noticed the following issues:

• source-map MUST stay at 0.6.1 for the ErrorMapper to work since SourceMapConsumer has been slightly reworked.
• Upgrading rollup to 1.0.0 will yield some deprecation warnings:

(!) rpt2 plugin: The ongenerate hook used by plugin rpt2 is deprecated. The generateBundle hook should be used instead.
(!) rpt2 plugin: The onwrite hook used by plugin rpt2 is deprecated. The generateBundle hook should be used instead.
(!) screeps plugin: The ongenerate hook used by plugin screeps is deprecated. The generateBundle hook should be used instead.
(!) screeps plugin: The onwrite hook used by plugin screeps is deprecated. The generateBundle hook should be used instead.

• I wasn't sure whether the rpt2 or rpt3 plugin are the way to go for TypeScript 3.2+.

[TheAifam5]

@ChristianIvicevic there is also another issue with source-map:
Error: Unknown module 'fs'

fs (imported by node_modules/source-map/lib/read-wasm.js, commonjs-external:fs)
path (imported by node_modules/source-map/lib/read-wasm.js, commonjs-external:path)

[lpx1233]

@ChristianIvicevic there is also another issue with source-map:
Error: Unknown module 'fs'

fs (imported by node_modules/source-map/lib/read-wasm.js, commonjs-external:fs)
path (imported by node_modules/source-map/lib/read-wasm.js, commonjs-external:path)

Same issue here. Had to remove the usage of ErrorMapper in main.ts....

[folke]

The new source-map module is async only, so can't work with screeps. It needs to be pinned to =0.6.1, which is the last version that was not async.

[kotarou]

Addressed by #167