Fix support for null literals#536

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mpenick wants to merge 6 commits intographql-go:masterfrom

Commits on Mar 20, 2020

Add support for null literals

Mike
authored and
Michael Penick
committed
Fix list element index in error messages
Michael Penick
committed

Commits on Mar 25, 2020

Fix support for null literals
Michael Penick
committed

Commits on Apr 8, 2020

Remove leftover changes
Michael Penick
committed
Fix formatting
Michael Penick
committed
Remove debug code
Michael Penick
committed