ci: use cue version from go.mod

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

.github/workflows/ci.yml

@@ -17,16 +17,21 @@ jobs:
           go-version: 1.16
         id: go
 
+      - name: Check out
+        uses: actions/checkout@v2
+
       - name: Install Dependencies
         run: |
           sudo apt-get update
           sudo apt-get install -y --no-install-recommends shellcheck
+
+          export CUE_VERSION="$(grep cue ./go.mod | cut -d' ' -f2)"
+          export CUE_TARBALL="cue_$(echo "$CUE_VERSION" | sed 's/^v//')_Linux_x86_64.tar.gz"
+
+          echo "Installing cue version $CUE_VERSION"
           curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sudo sh -s -- -b /usr/local/bin v1.23.8
-          curl -L https://github.com/cuelang/cue/releases/download/v0.3.0-beta.5/cue_0.3.0-beta.5_Linux_x86_64.tar.gz | sudo tar zxf - -C /usr/local/bin
-
-      - name: Check out
-        uses: actions/checkout@v2
 
+          curl -L https://github.com/cuelang/cue/releases/download/${CUE_VERSION}/${CUE_TARBALL} | sudo tar zxf - -C /usr/local/bin
       - name: Build
         run: |
           make