Update all dependencies to latest version

[aminimalanimal]

This PR updates all dependencies to their latest version, using yarn upgrade-interactive --latest.
It is a follow-up to PR 11, which didn't target the proper branch. (This branch was created from developer instead of master as well).

This is untested. I installed Docker and ran the commands mentioned under the Development section of the repo's README, but am unfamiliar with Docker and could not get a yarn link between projects to throw the errors I expected (even with only pug-lint updated, which properly threw errors for me yesterday when linking the master branches together).

Below is the original PR's description.

Update pug-lint to version 2.6.0 to resolve issue #7

This PR updates pug-lint-vue's pug-lint dependency to version 2.6.0 to fix Issue #7 (doesn't support v-bind shorthand).

pug-lint published version 2.6.0 today to fix this error by updating its pug-lexer dependency to 4.0.

I have yarn link 'ed pug-lint-vue to test it locally and can confirm that this dependency upgrade corrects the issue.

[aminimalanimal]

When I run docker-compose up, I receive this output in the console:

Starting pug-lint-vue_app_1 ... done
Attaching to pug-lint-vue_app_1

It seems to hang there indefinitely. I started to wonder if I should open another console tab to run docker-compose exec app bash in it. When I did, I didn't really understand the results. Can someone enlighten me?