Merge pull request #214 from shikorism/feature/editorconfig

.editorconfigを追加

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+end_of_line = lf
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.yml]
+indent_size = 2
+
+[*.json]
+indent_size = 2
+
+[composer.json]
+indent_size = 4