Update version number to v0.3.4 (rust-random#736)

Forgot this because I'm out of practice.

Signed-off-by: Joe Richey <joerichey@google.com>

Author: josephlr

CHANGELOG.md

@@ -631,7 +631,7 @@ Publish initial implementation.
 ## [0.0.0] - 2019-01-19
 Publish an empty template library.
 
-[0.3.4]: https://github.com/rust-random/getrandom/compare/v0.3.3...HEAD
+[0.3.4]: https://github.com/rust-random/getrandom/compare/v0.3.3...v0.3.4
 [0.3.3]: https://github.com/rust-random/getrandom/compare/v0.3.2...v0.3.3
 [0.3.2]: https://github.com/rust-random/getrandom/compare/v0.3.1...v0.3.2
 [0.3.1]: https://github.com/rust-random/getrandom/compare/v0.3.0...v0.3.1

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "getrandom"
-version = "0.3.3"
+version = "0.3.4"
 edition = "2021"
 rust-version = "1.63" # Sync tests.yml and README.md.
 authors = ["The Rand Project Developers"]