ShippableCI: Add integration tests, dub/dlang tools and package upload

tools/upload-to-github.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -euo pipefail
+
+if [ "$#" -ne 2 ]; then
+  echo "Usage: $0 <tag> <file> (and GITHUB_TOKEN environment variable)"
+  exit 1
+fi
+
+releaseTag=$1
+artifact=$2
+artifactFilename=$(basename $artifact)
+
+releaseID="$(bash -c "curl -s https://api.github.com/repos/ldc-developers/ldc/releases/tags/$releaseTag | grep -m 1 '^  \"id\":'")"
+releaseID=${releaseID:8:-1}
+
+echo "Uploading $artifact to GitHub release $releaseTag ($releaseID)..."
+curl -s \
+  -H "Authorization: token $GITHUB_TOKEN" \
+  -H "Content-Type: application/octet-stream" \
+  --data-binary @$artifact \
+  https://uploads.github.com/repos/ldc-developers/ldc/releases/$releaseID/assets?name=$artifactFilename