v1.12

Changes since v1.11:

• Switched from ACME v1 to ACME v2 support using release 0.16.0 of simp_le (#590)
• Set auth_request off for acme challenge location (#570)
• Added support for wildcard location configuration files (#588)
• Upgraded base image to alpine 3.10 (#586)
• Upgraded docker-gen build stage to go 1.13 (#587)

Other changes:

• Documentation updates and corrections. (#552 #589 #590)
• Various test suite updates, including switching to ACME v2 (#555 #590)