Bump file-saver from 1.3.3 to 2.0.2

Bumps [file-saver](https://github.com/eligrey/FileSaver.js) from 1.3.3 to 2.0.2.
- [Release notes](https://github.com/eligrey/FileSaver.js/releases)
- [Changelog](https://github.com/eligrey/FileSaver.js/blob/master/CHANGELOG.md)
- [Commits](eligrey/FileSaver.js@1.3.3...v2.0.2)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -145,7 +145,7 @@
     "es6-promise": "4.2.8",
     "ethereumjs-tx": "1.3.7",
     "eventemitter3": "3.1.2",
-    "file-saver": "1.3.3",
+    "file-saver": "2.0.2",
     "flat": "4.1.0",
     "format-json": "1.0.3",
     "format-number": "3.0.0",