5.1.0

• Optionally create an availability set #228 (DatsloJRel)
• Update README.md with Powershell error resolution. #226 (DatsloJRel)
• Update readme to recommend new virtual machine module #225 (lonegunmanb)
• Bump github.com/Azure/terraform-module-test-helper from 0.6.0 to 0.7.1 in /test #221 (dependabot[bot])
• Bump github.com/gruntwork-io/terratest from 0.41.7 to 0.41.9 in /test #219 (dependabot[bot])