update rust

[reenigneEsrever92]

Update rust to version 1.51.

[derek[bot]]

Thank you for your contribution. I've just checked and your commit doesn't appear to be signed-off. That's something we need before your Pull Request can be merged. Please see our contributing guide. Tip: if you only have one commit so far then run: git commit --amend --signoff and then git push --force.

[mattn]

Any update on this?

[alexellis]

Hi @mattn this PR is 3 years old. The update we can assume is that the PR was abandoned.

Feel free to send your own, we ask for instructions to be included that show testing output.

[alexellis]

/lock: abandoned by contributor