fix(bundle-and-ignore): case sensitivity cleanup

Two files got into node_modules in a way that changes if you are on a
system that is case sensitive. One was a readme that is now properly
being ignored, the other is a typescript file that is upper case in some
instances

PR-URL: #3540
Credit: @wraithgar
Close: #3540
Reviewed-by: @ruyadorno

Author: wraithgar

node_modules/.gitignore

@@ -30,7 +30,9 @@ arb.loadVirtual().then(tree => {
 /.package-lock.json
 package-lock.json
 CHANGELOG*
+changelog*
 README*
+readme*
 .editorconfig
 .idea/
 .npmignore