build: Include non-dryrun semantic release step

.drone.yml

@@ -128,4 +128,26 @@ steps:
   pull: always
   commands:
   - |
-    echo 'foo'
+    apt-get update
+  - |
+    apt-get install -y --no-install-recommends \
+      git-core \
+      ca-certificates
+  - |
+    npm install \
+      semantic-release \
+      @semantic-release/commit-analyzer \
+      @semantic-release/git \
+      @semantic-release/release-notes-generator
+  - |
+    export GIT_CREDENTIALS=$${GIT_USERNAME}:$${GIT_APIKEY}
+  - |
+    npx semantic-release \
+      --branches ${DRONE_BRANCH} \
+      --tag-format "v\$${version}" \
+      --dry-run \
+      --plugins @semantic-release/commit-analyzer,@semantic-release/release-notes-generator,@semantic-release/git
+  environment:
+    GIT_APIKEY:
+      from_secret: git_apikey
+    GIT_USERNAME: djpbessems