DOC: v0.13.0 HDFStore corrections
BLD: fix json to build on windows, @Komnomnomnom
TST: dtypes tests fix for 32-bit
Merge pull request #4860 from jreback/dtypes_fix

TST: dtypes tests fix for 32-bit
BUG: lib.maybe_convert_objects work with uint64

When it's greater than uint64 max (and not negative, etc.)
TST: Add test cases for lib.maybe_convert_objects directly

remove extraneous typecheck against uint64

better dtype checks in test_frame

update tests to reflect actual use of uint64, etc
Try using a separate uint64 function