Add editor config.

Author: yajra

.editorconfig

@@ -0,0 +1,16 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.yml]
+indent_style = space
+indent_size = 2

.gitattributes

@@ -1,6 +1,7 @@
 * text=auto
 
 /tests export-ignore
+.editorconfig export-ignore
 .gitattributes export-ignore
 .gitignore export-ignore
 .php_cs export-ignore