flag: replace interface{} -> any for textValue.Get method
Make it literally match the Getter interface.
Change-Id: I73f03780ba1d3fd2230e0e5e2343d40530d9e6d8
GitHub-Last-Rev:
398b90b2fb04fdd401a1d719bf3ce19152a4cf6a
GitHub-Pull-Request: golang/go#71975
Reviewed-on: https://go-review.googlesource.com/c/go/+/652795
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>