chore: update linter and style config

.jshintrc

@@ -1,4 +1,5 @@
-{ "node": true
-, "browser": true
-, "esversion": 8
+{
+  "node": true,
+  "browser": false,
+  "esversion": 9
 }

.prettierrc

@@ -1,8 +0,0 @@
-{
-  "bracketSpacing": true,
-  "printWidth": 80,
-  "singleQuote": true,
-  "tabWidth": 4,
-  "trailingComma": "none",
-  "useTabs": false
-}

.prettierrc.json

@@ -0,0 +1,8 @@
+{
+    "bracketSpacing": true,
+    "printWidth": 80,
+    "singleQuote": true,
+    "tabWidth": 4,
+    "trailingComma": "none",
+    "useTabs": false
+}