Update dependency hvac to v1.2.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
hvac	==1.1.1 -> ==1.2.1

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Release Notes

hvac/hvac (hvac)

v1.2.1

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This release fixes an inaccuracy in a warning message but does not otherwise change functionality.

🐛 Bug Fixes

• Fix raise_on_deleted_version warning (GH-1045)

v1.2.0

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This is the last expected release before v2.0.0.

📢 Deprecations / Announcements

• ldap auth method - add missing configure params by vault api names (GH-975)
• expand Vault CI matrix, announce deprecation of Vault dynamic SSH keys (GH-1023)
• Breaking changes coming to Client.write method (GH-1034)
• Support for Python 3.6 & 3.7 will be dropped in v2.0.0 (GH-877)
• Support for the Legacy MFA methods will be dropped from the MFA class in v2.0.0 (GH-1026)
• Breaking changes coming to Adapters' use of custom sessions (GH-1040)

🚀 Features

• Add alias_name_source for Kubernetes Auth create_role (GH-1039)
• add Client.write_data method (GH-1028)
• ldap auth method - add missing configure params by vault api names (GH-975)
• Re-add arguments to create_or_update_role() from old API (GH-842)
• Add new argument (conflicting_alias_ids_to_keep) to merge_entities method (GH-968)
• Add impersonated account support to GCP secrets engine (GH-1022)
• support "user_claim_json_pointer" in create_role() for JWT/OIDC auth method (GH-1006)
• Add static account support to GCP secrets engine (GH-956)
• adding batch_input to transit.sign_data #​988 (GH-990)
• Add a method to read static roles in the database engine (GH-1009)
• feat: add support for disable_local_ca_jwt in the Kubernetes auth method (GH-997)

🐛 Bug Fixes

• add Client.write_data method (GH-1028)
• Fix premature read on stream requests in the sys.take_raft_snapshot method (GH-771)
• fix(__getattr__): non-existent attribute lookup (GH-982)

📚 Documentation

• docs(secrets-engines): Add database secrets engine docs (GH-1036)
• docs: make OIDC Authorization URL Request example work again. (GH-1010)

🧰 Miscellaneous

• add tests and docs to sdist, improve build testing (GH-1015)
• Bump certifi from 2022.9.14 to 2022.12.7 (GH-1013)

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