Add missing fails to end of try blocks in tests

[bbb651]

I'm working on changes to read{Int,Long,Float,Double} to make them less greedy and noitced some tests that should've failed.

I went through every try catch and verified try properly fails.

[bbb651]

I finished implementing my primitive parsing rework, making a PR is blocked on this. Is it ok to remove isAllowedNumber? There are at least a few usages of it, mainly in minecraft mods, I think it's quite unfortunate it was public in the first place (on that note, should isAsciiDigit be private?)

By the way, I noticed readBoolean uses readString() rather than readUnquotedString() directly, making it parse "true" and "false" in addition to true and false. Is this intended? It's untested and undocumented.