Fix Highlighter, edits and build scrip

[hxjuneja]

This pull requests

• fix the highlighter
• fix a small bugs to enable the edits again
• fix the build script
• fix column and row addition

[robertleeplummerjr]

Can you write some tests that ensure this stays resolved in the future? Currently tests are located: https://github.com/Spreadsheets/WickedGrid/tree/master/legacy-tests

But we do need some tlc there.

[hxjuneja]

@robertleeplummerjr Can you please have a fresh look?

I have fixed the tests and for the start enabled adding of new rows and columns. I also added my commit which fixes adding new rows and columns.

Next, I will try to fix deleting columns and rows and will enable the tests for it as well.