Update getrandom requirement from 0.2.3 to 0.3.1

Updates the requirements on [getrandom](https://github.com/rust-random/getrandom) to permit the latest version.
- [Changelog](https://github.com/rust-random/getrandom/blob/master/CHANGELOG.md)
- [Commits](rust-random/getrandom@v0.2.3...v0.3.1)

---
updated-dependencies:
- dependency-name: getrandom
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Diff for: Cargo.toml

@@ -47,7 +47,7 @@ url = "2.2.2"
 webbrowser = { version = "1.0.0", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-getrandom = { version = "0.2.3", features = ["js"] }
+getrandom = { version = "0.3.1", features = ["js"] }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 getrandom = "0.2.3"