chore(lib/ui): make URL https:// prefixed (#410)

lib/ui.js

@@ -77,7 +77,7 @@ class AppUI extends UI {
                  `${c.bold('=============================================================')}\n\n` +
                  `Instead, you should use the plugin produced for your development stack\n` +
                  `(like Truffle, Buidler) or design a custom workflow using the package API\n\n` +
-                 `> See github.com/sc-forks/solidity-coverage for help with configuration.\n\n` +
+                 `> See https://github.com/sc-forks/solidity-coverage for help with configuration.\n\n` +
                  `${c.green.bold('Thanks! - sc-forks')}\n`,
     };