fix(package): updated postcss to v7.0.13

Author: AnthonyNahas

package-lock.json

@@ -88,7 +88,7 @@
     "jest-preset-angular": "^6.0.2",
     "lodash": "^4.17.11",
     "node-sass": "^4.11.0",
-    "postcss": "^7.0.11",
+    "postcss": "^7.0.13",
     "postcss-strip-inline-comments": "^0.1.5",
     "pump": "^3.0.0",
     "raw-loader": "^0.5.1",