update `brsmatch()` to work with no never-treated (#3)

skent259 / rsmatch

Matching Methods for Time-Varying Observational Studies, in R

https://skent259.github.io/rsmatch/

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Closed skent259 closed 3 years ago

skent259 commented 3 years ago

fixes #3
update testing to catch this problem
main problem was valid_match would be all false, leading to 0 row data.frame. Fixed by subsetting after creation.