Add .editorconfig file (yorkie-team#361)

Co-authored-by: Youngteac Hong <[email protected]>

Author: live-small

.editorconfig

@@ -0,0 +1,12 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+indent_size = 2

.prettierrc.js

@@ -3,5 +3,4 @@ module.exports = {
   singleQuote: true,
   trailingComma: 'all',
   printWidth: 80,
-  tabWidth: 2,
 };