Newer versions of the babel packages allow for removing some types packages as well as some helper
packages. The `@babel/template` package export used within the CLI is accessible from the `@babel/core`
package which allows removal of `@babel/template` as a direct dependency. Also, the `@babel/plugin-proposal-async-generator-functions`
package has been transitioned to `@babel/plugin-transform-async-generator-functions` due to async generators
being merged into the ECMAScript standard. Minor code cleanup based on the type cleanup was also performed
in the build optimizer babel passes.
All TypeScript files have been updated to pass the new eslint-based linting checks. eslint compatible disabling comments have also been added in place of the previous tslint comments.
When using the `statsJson` browser builder option, the resulting JSON data is now streamed into a file instead of written in one large block. This mitigates crashes due to the generated string exceeded the Node.js limit.
