Add .editorconfig

.editorconfig

@@ -0,0 +1,10 @@
+# editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

package.json

@@ -34,4 +34,4 @@
     "README.md",
     "index.js"
   ]
-}
+}