pr-automerge: enable automerging linux-only PRs
pr-automerge: enable automerging linux-only PRs

MikeMcQuaid/brew,MikeMcQuaid/brew,Homebrew/brew,MikeMcQuaid/brew,EricFromCanada/brew,nandub/brew,nandub/brew,EricFromCanada/brew,Homebrew/brew,MikeMcQuaid/brew,JCount/brew,JCount/brew,Homebrew/brew,JCount/brew,nandub/brew,EricFromCanada/brew,nandub/brew,JCount/brew,EricFromCanada/brew,Homebrew/brew