Update dependency rollup to v1.31.1 (#315)

Author: renovate-bot

package.json

@@ -57,7 +57,7 @@
     "npm-run-all": "4.1.5",
     "prettier": "1.19.1",
     "rimraf": "3.0.2",
-    "rollup": "1.31.0",
+    "rollup": "1.31.1",
     "sirv-cli": "0.4.5",
     "typescript": "3.7.5"
   },

yarn.lock

@@ -3608,10 +3608,10 @@ rimraf@^3.0.0:
   dependencies:
     glob "^7.1.3"
 
-[email protected].0:
-  version "1.31.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.31.0.tgz#e2a87212e96aa7850f3eb53fdd02cf89f2d2fe9a"
-  integrity sha512-9C6ovSyNeEwvuRuUUmsTpJcXac1AwSL1a3x+O5lpmQKZqi5mmrjauLeqIjvREC+yNRR8fPdzByojDng+af3nVw==
+[email protected].1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.31.1.tgz#4170d6f87148d46e5fbe29b493f8f3ea3453c96f"
+  integrity sha512-2JREN1YdrS/kpPzEd33ZjtuNbOuBC3ePfuZBdKEybvqcEcszW1ckyVqzcEiEe0nE8sqHK+pbJg+PsAgRJ8+1dg==
   dependencies:
     "@types/estree" "*"
     "@types/node" "*"