At Update annotation, should we be most restrict

[otaviojava]

Fixes:

#403

[njr-11]

This is a good idea to limit the possible numeric return types because float and double don't make sense, but we should still include long. I realize no one will supply that many entities to be updated/deleted at once and so int is more than enough to represent the value. However, long is very commonly used in applications so I think we should allow it as a return type as well.

Also, I made a couple of minor grammar corrections in the suggested changes.

[otaviojava]

@njr-11 I am okay to keep long.