Adds a pre-commit config (#3)

- adds a pre-commit config
- includes prettier formatting configuration
- fixes title in README
- adds a CircleCI config
- sets default pre-commit stage to commit

.prettierrc

@@ -0,0 +1,11 @@
+{
+  "trailingComma": "none",
+  "tabWidth": 2,
+  "semi": false,
+  "endOfLine": "auto",
+  "bracketSpacing": true,
+  "vueIndentScriptAndStyle": false,
+  "htmlWhitespaceSensitivity": "ignore",
+  "printWidth": 88,
+  "singleQuote": true
+}