chore: release 4.0.0

[release-please]

🤖 I have created a release *beep* *boop*

4.0.0 (2020-08-26)

⚠ BREAKING CHANGES

• Replica configuration has been reworked. Please see the upgrade guide for details.
• Users and databases have been moved and require a state migration. See the upgrade guide for details.

Features

• Add encryption_key_name variable for MS SQL module (#132) (2bd0f41)
• Add location support to backup_configuration block (#126) (aa907bd)
• add SQL Server support with new submodule (#112) (4a775fb)
• Added random_id option for instance name (#116) (7c8c799)
• Rework replicas to use for_each and new configuration style (5e1ae20)

Bug Fixes

• Fix issue with replica state key and random IDs (#141) (71b51fd)
• Update versions to allow for Terraform 0.13 (#135) (86c533a)
• docs: Update links for database flags on postgresql and mysql (#134) (e6a31ca)
• Relax Provider version (#133) (ec2a109)
• Updated users and databases creation to use for_each (#100) (d433995)

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This PR was generated with Release Please.

[morgante]

Release blockers:

• Migration script
• Upgrade guide
• Can't converge mysql-hq example #137

[ChandranshuRao14]

Any updates on this release?

[morgante]

@ChandranshuRao14 It's pending #121

[symbiont-jon-bogaty]

Is there a timeframe for 0.13 support? Trying to figure out when I can stop vendoring master. Thanks!

[morgante]

Sorry for the long delay here. Once tests pass on this PR I think we'll be good to release.

[syedrakib]

waiting on this to upgrade my TF to v0.13

[morgante]

I'm just waiting on a fix for #137 before we can release.