build: add commitlint exception for Dependabot

Dependabot commit messages are prefixed by `build(deps):`. Adding an
exception for the `build` prefix.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

commitlint.config.js

@@ -0,0 +1,17 @@
+const Configuration = {
+  /*
+   * Resolve and load @commitlint/config-conventional from node_modules.
+   */
+  extends: ['@commitlint/config-conventional'],
+  /*
+   * Any rules defined here will override rules from @commitlint/config-conventional
+   */
+  rules: {
+    /*
+     * Add 'build' to the default list for Dependabot PRs.
+     */
+    'type-enum': [2, 'always', ['feat', 'fix', 'docs', 'style', 'refactor', 'test', 'revert', 'build']],
+  },
+};
+
+module.exports = Configuration;