Switches to .prettierrc from .js

VSCode had trouble parsing the `printWidth` and kept defaulting
to 100 which in turn caused the formatter in VSCode to produce
different results than `npm run format`.

An autofix attempt has also been added when `lint-stage`ing

Author: gnikit

.prettierrc

@@ -0,0 +1,15 @@
+{
+  "printWidth": 100,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "jsxSingleQuote": false,
+  "quoteProps": "consistent",
+  "trailingComma": "es5",
+  "bracketSpacing": true,
+  "jsxBracketSameLine": false,
+  "arrowParens": "avoid",
+  "endOfLine": "lf",
+  "embeddedLanguageFormatting": "auto"
+}

.prettierrc.js

@@ -28,5 +28,6 @@
   },
   "[markdown]": {
     "editor.defaultFormatter": "esbenp.prettier-vscode"
-  }
+  },
+  "prettier.configPath": ".prettierrc"
 }

.vscode/settings.json

@@ -252,6 +252,7 @@
   "lint-staged": {
     "*.ts": [
       "npm run format",
+      "npm run lint-fix",
       "npm run lint -- --max-warnings=0"
     ]
   },