build(deps-dev): bump rollup from 2.23.1 to 2.26.2 (#423)

Author: dependabot[bot]

package-lock.json

@@ -68,7 +68,7 @@
     "prettier": "^2.0.5",
     "reflect-metadata": "0.1.13",
     "rimraf": "3.0.2",
-    "rollup": "^2.23.1",
+    "rollup": "^2.26.2",
     "rollup-plugin-terser": "^7.0.0",
     "ts-jest": "^26.1.4",
     "ts-node": "^8.10.2",