prepare 4.5.0 release

ready 4.4.2 release

4.4.1 release prep

Merge pull request TypeStrong#786 from TypeStrong/feature/webpack-4-e…

…rror

error when not using webpack 4

add 2.9.1 to test matrix

Prepare for 4.3.0 release

make tests ignore builtat

preparing 4.1.0 release

Prepare for 4.0.1 release

Upgrade to webpack 4