add GitHub workflow, remove circleci

Signed-off-by: Tony Worm <tony@hofstadter.io>

.github/workflows/default.cue

@@ -0,0 +1,27 @@
+import "github.com/hofstadter-io/ghacue"
+
+ghacue.#Workflow & {
+	name: "hof"
+	on: ["push", "pull_request"]
+	jobs: test: {
+		strategy: matrix: {
+			"go-version": ["1.15.x", "1.16.x"]
+			os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+		}
+		"runs-on": "${{ matrix.os }}"
+		steps: [{
+			name: "Install Go"
+			uses: "actions/setup-go@v2"
+			with: "go-version": "${{ matrix.go-version }}"
+		},{
+			name: "Checkout code"
+			uses: "actions/checkout@v2"
+		},{
+			name: "Build hof"
+			run: """
+			go mod download
+			GOOS=${{ matrix.os }} go build ./cmd/hof
+			"""
+		}]
+	}
+}

cue.mods

@@ -7,5 +7,6 @@ require (
   github.com/hofstadter-io/hofmod-cuefig v0.0.3
 )
 
+replace github.com/hofstadter-io/ghacue => ../ghacue
 replace github.com/hofstadter-io/hofmod-cli    => ../mods/cli
 replace github.com/hofstadter-io/hofmod-cuefig => ../mods/cuefig

cue.sums

@@ -2,6 +2,8 @@ github.com/hofstadter-io/cuelib v0.0.5 h1:qvdAC7syR2NzZ45QlSfD3hNHDOiqi7eBasE8ZY
 github.com/hofstadter-io/cuelib v0.0.5/cue.mods h1:cva4f8ge4Qb6GOEqa9AhdF1pIBnGwGuPda+CITwLDCs=
 github.com/hofstadter-io/cuetest v0.0.2 h1:UAzHAbZYF1dPck2qQAJ4FwhVC1op7F7s+4UC0FQV7eg=
 github.com/hofstadter-io/cuetest v0.0.2/cue.mods h1:KE5GytNGpbuRzzNWR5Lq7KAy04uu3fQ3hCClpF7+olE=
+github.com/hofstadter-io/ghacue v0.0.0 h1:I6pZS3dsvuxH4f7l9EULpvkO+cmIBKp2f0R9EK045X8=
+github.com/hofstadter-io/ghacue v0.0.0/cue.mods h1:6BbcRic6px1+lCLiW6O5dYt+GcCpnmzdpbcILHrqhOQ=
 github.com/hofstadter-io/hofmod-cli v0.0.0 h1:QlL53XCCwLCzIpN6Y8n9+veyTmQH7BywSGpRaX78sAo=
 github.com/hofstadter-io/hofmod-cli v0.0.0/cue.mods h1:CZbXtU+Ia+oNdgLkkVeT/Mr4AG735lmVF/ngrbbCf28=
 github.com/hofstadter-io/hofmod-cli v0.3.5 h1:AKf1BeHDiVvRZLPoNC0gaRq+8H3vwnQrW/1IryOOydM=