Update dependency rollup to v2.26.8

Author: renovate-bot

package.json

@@ -44,7 +44,7 @@
     "npm-run-all": "4.1.5",
     "phantomjs-prebuilt": "2.1.16",
     "prettier": "2.1.1",
-    "rollup": "2.26.5",
+    "rollup": "2.26.8",
     "rollup-plugin-terser": "7.0.1",
     "should": "13.2.3",
     "ts-node": "9.0.0",

yarn.lock

@@ -4359,10 +4359,10 @@ rollup-plugin-terser@7.0.1:
     serialize-javascript "^4.0.0"
     terser "^5.0.0"
 
-rollup@2.26.5:
-  version "2.26.5"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.26.5.tgz#5562ec36fcba3eed65cfd630bd78e037ad0e0307"
-  integrity sha512-rCyFG3ZtQdnn9YwfuAVH0l/Om34BdO5lwCA0W6Hq+bNB21dVEBbCRxhaHOmu1G7OBFDWytbzAC104u7rxHwGjA==
+rollup@2.26.8:
+  version "2.26.8"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.26.8.tgz#7b02353835a73c4797f42177a5fa3fc074012713"
+  integrity sha512-li9WaJYc5z9WzV1jhZbPQCrsOpGNsI+Li1qyrn5n745ZNSnlkRlBtj1Hs+Z0Dc2N1+P7HT34UKAEASqN9Th8cg==
   optionalDependencies:
     fsevents "~2.1.2"