feat!: Begin using new microgenerator for v2 firestore#91

Merged

crwilcox merged 15 commits intogoogleapis:v2-stagingfrom

crwilcox:onboard-microgen

Jul 14, 2020

Commits on Jul 11, 2020

Merge branch 'v2-staging' of github.com:googleapis/python-firestore into onboard-microgen
crwilcox
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Commits on Jul 13, 2020