cleanup and update of jquery-colorpicker dependency

js/jquery-colorpicker/.editorconfig

@@ -0,0 +1,13 @@
+# https://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.js,*.json,*.html,*.css]
+indent_size = 2