Documentation site not working on IE11

[Keats]

Environment

• Package version(s): master + whatever is deployed on the docs site
• Browser and OS versions: Windows 10/IE 11

If possible, ink to a minimal repro (fork this code sandbox): https://blueprintjs.com/docs/

Steps to reproduce

1. Go to https://blueprintjs.com/docs/ with IE11

Actual behavior

White screen

Expected behavior

See the documentation site

Possible solution

Ensure that arrow functions for the doc app are properly transpiled. I am getting some ugly lists after fixing that manually (only 2 places where it happens: documentalist and linkify) but could be the results of some other issues.

[adidahiya]

Should be fixed in the latest release.

[adidahiya]

Oops, meant to link this to #3482