Merge pull request cert-manager#1315 from munnerz/automated-cherry-pi…

…ck-of-#1314-release-0.6

Automated cherry pick of cert-manager#1314

Merge pull request cert-manager#1248 from munnerz/bump-go

Bump go to 1.11.4

Merge pull request cert-manager#1226 from munnerz/acme-client-metrics

Add prometheus metrics for ACME client HTTP requests

Merge pull request cert-manager#1207 from munnerz/bump-alpha.1

Bump for v0.6.0-alpha.1

Merge pull request cert-manager#1183 from munnerz/remove-flakey-unit

Remove flakey unit test in dns utils package

Merge pull request cert-manager#1087 from munnerz/v052

Bump manifests for v0.5.2

Merge pull request cert-manager#1080 from munnerz/v051

Bump manifests for v0.5.1

Merge pull request cert-manager#887 from munnerz/release-process

Add release process docs

Merge pull request cert-manager#815 from munnerz/version-bump

Bump image version for v0.4.1

Merge pull request cert-manager#727 from munnerz/automated-cherry-pic…

…k-of-#726-upstream-release-0.4

Automated cherry pick of cert-manager#726 upstream release 0.4