TS4 support and dependency upgrades

• Upgrade fork-ts-checker-webpack-plugin (and support TS4) #37
• Upgrade dependencies #38

Set babel source type to "unambiguous"

See: #36

Babel peer dependencies

Consumers should now install @babel/core and @babel/generator manually. If previously the build worked, then it should continue to work without doing so, but you'll get annoying warnings when installing dependencies.

#34

Dependency upgrades

WARNING: May break, please see #33 (comment)

#33

Add options to skip type and circular dependency checks

#32

Webpack 5 circular deps fix

Upgraded circular-dependency-plugin: #31

Related issue: jantimon/html-webpack-plugin#1541

Webpack 5

BREAKING CHANGE: Dropped support for Node < 10.13

#30

Use passed tsconfig

Use passed in tsconfig when checking TS. Previously this was not being passed on so it was using the default tsconfig which for most projects meant it was type checking the tests when building for production which both added overhead and caused it to fail when dev dependencies were not present

#28

Reduced logging

#21

Reduced logging improves performance.

Babel only compiling (no ts-loader)

#19
#20