chore: Remove right-pad as a dependency

Given that "padEnd()" has been around for a while, this is a
housekeeping commit to remove an extraneous dependency.

Author: iainjreid

package-lock.json

@@ -26,7 +26,6 @@
     "conventional-commit-types": "^3.0.0",
     "lodash.map": "^4.5.1",
     "longest": "^2.0.1",
-    "right-pad": "^1.0.1",
     "word-wrap": "^1.0.3"
   },
   "devDependencies": {