Bump rollup from 1.12.0 to 1.25.1

Bumps [rollup](https://github.com/rollup/rollup) from 1.12.0 to 1.25.1.
- [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/v1.12.0...v1.25.1)

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

package.json

@@ -86,7 +86,7 @@
     "pngjs": "^3.4.0",
     "proj4": "2.5.0",
     "puppeteer": "~1.20.0",
-    "rollup": "^1.12.0",
+    "rollup": "^1.25.1",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-node-resolve": "^5.0.0",