fix(package): updated postcss

Author: AnthonyNahas

package-lock.json

@@ -91,7 +91,7 @@
     "lodash": "^4.17.11",
     "ngx-combination-generator": "^2.0.0",
     "node-sass": "^4.11.0",
-    "postcss": "^7.0.8",
+    "postcss": "^7.0.9",
     "postcss-strip-inline-comments": "0.1.5",
     "pump": "3.0.0",
     "raw-loader": "^1.0.0",