fix(deps): update dependency rtlcss to v2.6.2

Author: renovate[bot]

package-lock.json

@@ -66,7 +66,7 @@
     "redux": "3.7.2",
     "redux-thunk": "2.2.0",
     "requirejs": "2.3.6",
-    "rtlcss": "2.2.1",
+    "rtlcss": "2.6.2",
     "sass": "^1.54.8",
     "sass-loader": "^14.1.1",
     "scriptjs": "2.5.9",