Update commitlint monorepo to v7.6.0

Author: renovate-bot

package-lock.json

@@ -40,8 +40,8 @@
     "@angular/cli": "7.3.8",
     "@angular/compiler-cli": "7.2.13",
     "@angular/language-service": "7.2.13",
-    "@commitlint/cli": "7.5.2",
-    "@commitlint/config-conventional": "7.5.0",
+    "@commitlint/cli": "7.6.0",
+    "@commitlint/config-conventional": "7.6.0",
     "@types/jasmine": "3.3.12",
     "@types/jasminewd2": "2.0.6",
     "@types/node": "8.10.45",