Update Rust crate rocket to 0.4.11

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rocket (source)	dependencies	patch	0.4.5 -> 0.4.11

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Release Notes

SergioBenitez/Rocket

v0.4.11

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See the CHANGELOG for more information.

v0.4.10

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Core

• [[3276b8][3276b8]] Removed used of unsafe in Origin::parse_owned(), fixing a
  soundness issue.

v0.4.9

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Core

• [[#1645][#​1645], [f2a56f][f2a56f]] Fixed Try impl FromResidual<Result> for Outcome.

v0.4.8

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Core

• [[#1548][#​1548], [93e88b0][93e88b0]] Fixed an issue that prevented compilation under
  Windows Subsystem for Linux v1.
• Updated Outcome Try implementation to v2 in latest nightly.
• Minimum required rustc is 1.54.0-nightly (2021-05-18).

Internal

• Updated base64 dependency to 0.13.

v0.4.7

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Core

• [#​1534, [2059a6][2059a6]] Fixed a low-severity, minimal impact soundness issue
  in uri::Formatter.

v0.4.6

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Core

• [[86bd7c][86bd7c]] Added default and configurable read/write timeouts:
  read_timeout and write_timeout.
• [[c24a96][c24a96]] Added the sse feature, which enables flushing by returning
  io::ErrorKind::WouldBlock.

Docs

• Fixed broken doc links in contrib.
• Fixed database library versions in contrib docs.

Internal

• Updated source code for Rust 2018.
• UI tests now use trybuild instead of compiletest-rs.

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