fix(fleekci): add git if missing

package.json

@@ -25,7 +25,7 @@
     "test:chrome": "playwright test -c playwright.config.js --project chromium",
     "test:firefox": "playwright test -c playwright.config.js --project firefox",
     "test:node": "aegir test -t node -f dist-tsc/test/node.js --cov",
-    "postinstall": "patch-package"
+    "postinstall": "git --version || npm install git && patch-package"
   },
   "browser": "./dist/src/index.js",
   "browserslist": [