Bump rollup from 1.32.1 to 2.1.0

Bumps [rollup](https://github.com/rollup/rollup) from 1.32.1 to 2.1.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v1.32.1...v2.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package-lock.json

@@ -9942,21 +9942,20 @@
       }
     },
     "rollup": {
-      "version": "1.32.1",
+      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.32.1.tgz",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.1.0.tgz",
-      "integrity": "sha512-/2HA0Ec70TvQnXdzynFffkjA6XN+1e2pEv/uKS5Ulca40g2L7KuOE3riasHoNVHOsFD5KKZgDsMk1CP3Tw9s+A==",
+      "integrity": "sha512-gfE1455AEazVVTJoeQtcOq/U6GSxwoj4XPSWVsuWmgIxj7sBQNLDOSA82PbdMe+cP8ql8fR1jogPFe8Wg8g4SQ==",
       "dev": true,
       "requires": {
-        "@types/estree": "*",
+        "fsevents": "~2.1.2"
-        "@types/node": "*",
-        "acorn": "^7.1.0"
       },
       "dependencies": {
-        "acorn": {
+        "fsevents": {
-          "version": "7.1.1",
+          "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.1.2.tgz",
-          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+          "integrity": "sha512-R4wDiBwZ0KzpgOWetKDug1FZcYhqYnUYKtfZYt4mD5SBz76q0KR4Q9o7GIPamsVPGmW3EYPPJ0dOOjvx32ldZA==",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },

package.json

@@ -88,7 +88,7 @@
     "pngjs": "^3.4.0",
     "proj4": "2.6.0",
     "puppeteer": "~2.1.0",
-    "rollup": "^1.25.1",
+    "rollup": "^2.1.0",
     "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",