build(deps): bump base64 from 0.21.4 to 0.21.5

[dependabot[bot]]

Bumps base64 from 0.21.4 to 0.21.5.

Changelog

Sourced from base64's changelog.

0.21.5

• Add Debug and Clone impls for the general purpose Engine

Commits

• 7f81baf v0.21.5
• 95dda57 Merge pull request #255 from marshallpierce/mp/debug
• bda313a Add Debug and Clone to general purpose Engine
• 53a8737 Merge pull request #254 from marshallpierce/mp/ci-all-targets
• c423b6e CI for all targets w/o default features
• 9eaf503 Merge pull request #253 from kpreid/features-and-build
• 04451fb Allow cargo test to complete under any set of features.
• 2ee1a00 no_std import simplification.
• See full diff in compare view

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (b1175ac) 91.47% compared to head (1a52a80) 91.47%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #75 +/- ## ======================================= Coverage 91.47% 91.47% ======================================= Files 18 18 Lines 938 938 ======================================= Hits 858 858 Misses 80 80 ```

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