add .editorconfig

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = true

.prettierrc

@@ -1,4 +0,0 @@
-{
-  "semi": false,
-  "printWidth": 120
-}