DEPR: Deprecate tshift and integrate it to shift#34545

Merged

jreback merged 8 commits intopandas-dev:masterfrom

fujiaxiang:deprecate_tshift

Jun 15, 2020

Commits on Jun 4, 2020

adjusted tests, added filterwarnings mark where applicable
fujiaxiang
committed

Commits on Jun 5, 2020

refactored and simplified shift and tshift
fujiaxiang
committed

Commits on Jun 15, 2020