feat: avoid unnecessary queries if there are no published sponsors (#46)

* feat: avoid unnecessary queries if there are no published sponsors

* fix: update composer.lock to fix CircleCI error

* chore: update composer dependencies

Author: dkoo

composer.json

@@ -7,7 +7,7 @@
   "require-dev": {
     "automattic/vipwpcs": "^2.0",
     "wp-coding-standards/wpcs": "^2.2",
-    "dealerdirect/phpcodesniffer-composer-installer": "^0.6.2",
+    "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
     "phpcompatibility/phpcompatibility-wp": "^2.1",
     "brainmaestro/composer-git-hooks": "^2.8"
   },