Bump thiserror from 1.0.11 to 1.0.15

[dependabot-preview]

Bumps thiserror from 1.0.11 to 1.0.15.

Release notes

Sourced from thiserror's releases.

1.0.15

• Improve error message when an error type is missing a Display impl (#75)

1.0.14

• Avoid triggering deprecation warnings when an error enum has deprecated variants

1.0.13

• Fix failure to compile Display impl if a format string contained more than 1 named interpolated variable and a trailing comma, as in #[error("{v1} {v2}",)]

1.0.12

• Produce a better error message if a #[source] or #[from] field contains a non-'static lifetime (#68)

Commits

• d8d55e6 Release 1.0.15
• 382445c Merge pull request #76 from dtolnay/span
• 4885372 Improve span of missing Display impl error
• b649704 Check which Error the error message refers to
• 5075ceb Add ui test for Error without Display impl
• 6fd4059 Release 1.0.14
• 4ede816 Merge pull request #73 from dtolnay/deprecated
• 33166f7 Allow matches to refer to deprecated variants
• 40b9073 Add test with deprecated variant
• 14b54d2 Release 1.0.13
• Additional commits viewable in compare view

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