add editorconfig

Author: gesquive

.editorconfig

@@ -0,0 +1,18 @@
+[*]
+charset=utf-8
+end_of_line=lf
+insert_final_newline=true
+indent_style=space
+indent_size=4
+
+[{.babelrc,.stylelintrc,jest.config,.eslintrc,*.json,*.jsb3,*.jsb2,*.bowerrc,*.yml,*.yaml}]
+indent_style=space
+indent_size=2
+
+[*.go]
+indent_style=tab
+tab_width=4
+
+[Makefile]
+indent_style=tab
+tab_width=4