Bump diesel from 1.4.5 to 1.4.6 in /server

[dependabot[bot]]

Bumps diesel from 1.4.5 to 1.4.6.

Release notes

Sourced from diesel's releases.

1.4.6

Fixed

• Fixed a use-after-free issue in the QueryableByName implementation of our Sqlite backend
• Updated several dependencies

Changelog

Sourced from diesel's changelog.

[1.4.6] - 2021-03-05

Fixed

• Fixed a use-after-free issue in the QueryableByName implementation of our Sqlite backend
• Updated several dependencies

Commits

• b0c8e99 Release diesel 1.4.6
• ae72835 Merge pull request #2663 from weiznich/bugfix/fix_use_after_free
• cead1a3 Downgrade max bigdecimal version as the new version is incompatible
• 2a612f0 Run cargo fmt
• d699f14 Bump some dependencies
• d219211 Address review comments
• d413328 Fix a use-after-free bug in our Sqlite backend
• 8e9e639 More fixes for mysql setup
• 453cfb8 Remove clippy from ci on release branch
• d856d35 Fix mysql instalation on macos
• Additional commits viewable in compare view

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