build: update rollup to version ~1.31.0

Author: renovate-bot

package.json

@@ -87,7 +87,7 @@
     "minimatch": "^3.0.4",
     "node-fetch": "^2.2.0",
     "protractor": "5.4.3",
-    "rollup": "~1.30.0",
+    "rollup": "~1.31.0",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-sourcemaps": "^0.5.0",

yarn.lock

@@ -8713,10 +8713,10 @@ [email protected]:
     "@types/node" "*"
     acorn "^7.1.0"
 
-rollup@~1.30.0:
-  version "1.30.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.30.0.tgz#ae9c893804e8eaa8f8f74b0aaf7e7fb4374a9d01"
-  integrity sha512-ANcmfaSQwpcJtZUTA0ZMNBtFcQ1B4A5FldlNqEK0WdWm9sHSKu93ffa2KV1ux8HA/yKIV/ZARV28m7rNdXJgEw==
+rollup@~1.31.0:
+  version "1.31.0"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.31.0.tgz#e2a87212e96aa7850f3eb53fdd02cf89f2d2fe9a"
+  integrity sha512-9C6ovSyNeEwvuRuUUmsTpJcXac1AwSL1a3x+O5lpmQKZqi5mmrjauLeqIjvREC+yNRR8fPdzByojDng+af3nVw==
   dependencies:
     "@types/estree" "*"
     "@types/node" "*"