Upgrade dependencies (#440)

* Upgrade @sinonjs/eslint-config to latest

And fix a couple of lint violations

* Upgrade @sinonjs/referee-sinon to latest

* Remove unnecessary eslint-plugin-prettier and eslint-config-prettier

In @sinonjs/eslint-config we have disabled all style rules and are using prettier's defaults, which are enforced by both commit hook and CI

* Upgrade mocha to latest

* Upgrade mochify to latest

* Upgrade nyc to latest

* Upgrade prettier to latest

* Upgrade jsdom to latest

* Upgrade husky to latest

* Upgrade lint-staged to latest

* Optional fsevents fix

* Fix linting issue

Co-authored-by: Carl-Erik Kopseng <carlerik@gmail.com>

.eslintrc.yaml

@@ -1,6 +1,5 @@
 extends:
   - "@sinonjs/eslint-config"
-  - "plugin:prettier/recommended"
 
 overrides:
   - files: "**/*-test.js"

.husky/pre-commit

@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+$(npm bin)/lint-staged
+