Bump eslint-plugin-shopify and stylelint-config-shopify versions

[BPScott]

WHY are these changes introduced?

VSCode's stylelint extension checks on typing. Sometimes when you're typing you write unparsable code - because you've wrote if { but not the } yet.

When this happens you get a bunch of problem notifications raised because prior to this change eslint and stylelint crashed when given unparsable code:

WHAT is this pull request doing?

This bumps the versions of the eslint and stylelint prettier plugins to not crash when faced
with invalid code, so these errors-because-youve-not-finished-typing are denoted as temporary red squiggly lines instead of those problem popups.

How to 🎩

• Have the stylelint VSCode plugin installed
• yarn install
• Restart VSCode
• Write some unparsable code in a tsx file. I suggest changing an export to ex}port. See that no problem notification appears