add --where option: similar to --for-each but better expresses the intention: filtering
The --for-each is more universal and can be used for both transformations and filtering.
d5c5bd65f364c9096e03d66abe4f81c54448d5ca v0.8
232540baef3c6c4a4ec4d57d47222a36b85ca197 v0.9
4895c98a7d62bd029d9c3de81df8bf9b19cbfe5b v0.10
09981db6ad87c9d9301bc4194abb8606dc133517 v0.11
64d9244ee252adeb08a8c24245519a7fdec2062f v0.12
5288af2e4921a438ac9e9f26788722572dbdee45 v0.13