chore(deps): update dependency rollup to v2.21.0

Author: renovate-bot

package.json

@@ -44,7 +44,7 @@
     "npm-run-all": "4.1.5",
     "phantomjs-prebuilt": "2.1.16",
     "prettier": "2.0.5",
-    "rollup": "2.18.2",
+    "rollup": "2.21.0",
     "rollup-plugin-terser": "6.1.0",
     "should": "13.2.3",
     "ts-node": "8.10.2",

yarn.lock

@@ -4276,10 +4276,10 @@ rollup-plugin-terser@6.1.0:
     serialize-javascript "^3.0.0"
     terser "^4.7.0"
 
-rollup@2.18.2:
-  version "2.18.2"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.18.2.tgz#886ac6e4549e493df106c3e2580c89aeb997be25"
-  integrity sha512-+mzyZhL9ZyLB3eHBISxRNTep9Z2qCuwXzAYkUbFyz7yNKaKH03MFKeiGOS1nv2uvPgDb4ASKv+FiS5mC4h5IFQ==
+rollup@2.21.0:
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.21.0.tgz#d2e114533812043d5c9b7b0a83f1b2a242e4e1d6"
+  integrity sha512-BEGgy+wSzux7Ycq58pRiWEOBZaXRXTuvzl1gsm7gqmsAHxkWf9nyA5V2LN9fGSHhhDQd0/C13iRzSh4bbIpWZQ==
   optionalDependencies:
     fsevents "~2.1.2"