fix: pad resource data
fix: pad resource data

Simpler approach to achieve the main goal of #32. Based esp. on a comment by
@tc-hib:

 > in [resource data entry](
 > https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#resource-data-entry)
 > you should only find offsets that are multiples of 4.

(https://github.com/akavel/rsrc/issues/12#issuecomment-630422578)

HUUUUUUGE THANKS to @tc-hib, for his work with PR #32, for his patience,
perseverance and replies, and for the invaluable comment quoted above.

akavel/rsrc