prepare for v1.7.2 release

correct history

build history and uprev version (pydantic#2040)

* build history and uprev version

* tweak history

* add pydantic#744 to changelog

* bump

uprev

use codecov github action to do retries (pydantic#1709)

uprev

fix deploy

uprev

uprev

prepare v1.2 (pydantic#1042)

* making field-reuse idempotent (pydantic#1016)

* making field-reuse idempotent

* fix for 3.6

* correct change details

* uprev

* generate HISTORY.md