Bump serialport from 3.3.0 to 4.0.1

[dependabot-preview]

Bumps serialport from 3.3.0 to 4.0.1.

Changelog

Sourced from serialport's changelog.

[4.0.1] - 2020-04-17

Added

Changed

• Update maintenance status to looking for a new maintainer.

Fixed

• Properly initialize DCB structure on Windows. This fixes some non-functional devices. !97

Removed

[4.0.0] - 2020-12-17

Added

• Added send_break() to TTYPort !69
• Enable available_ports() for Linux musl targets and those without the libudev feature enabled by scanning /sys/ for ports. !72
• ENOENT and EACCES errors are now exposed as NotFound and PermissionDenied errors on Linux !80
• try_clone_native() was added to COMPort and TTYPort to complement SerialPort::try_clone() but returning the concrete type instead. !85
• Added set_break() and clear_break() to SerialPort !70

Changed

• Minimum supported Rust version is now 1.36.0 to support the mem::MaybeUninit feature.
• The platform-specific TTYPort/BreakDuration and COMPort are now at the root level rather than under the posix and windows submodules respectively.
• Opening SerialPort s now uses the builder pattern through serialport::new(). See the README for concrete examples. !73
• SerialPorts s are no longer opened with a default timeout of 1ms
• Under linux, the manufacturer and product fields of UsbPortInfo now take their values from the ID_VENDOR_FROM_DATABASE and ID_MODEL_FROM_DATABASE udev properties respectively, instead of the ID_VENDOR and ID_MODEL properties that were used before. When the _FROM_DATABASE values are not available, it falls back to the old behavior. !86
• POSIX ports are no longer opened in exclusive mode. After opening they can be made exclusive via TTYPort::set_exclusive(). !98

Fixed

• Raised the version specification for bitflags to 1.0.4. Previously it was set to 1.0.0, but this version of bitflags is actually incompatible with Rust 2018 style macro imports that serialport-rs requires. !83

Removed

• Removed the serialport::prelude module. Types should be explicitly imported or can be glob-imported from the root like use serialport::*.

... (truncated)

Commits

• d635ca0 (cargo-release) version 4.0.1
• 0d18a30 Update changelog
• 4a4a5d9 Update status
• 821cdf1 Remove AppVeyor build badge
• f06434b Merge branch 'dcb_init_fix' into 'master'
• 4620188 Fix invalid pointer
• a0d9838 Add casts to fix type errors
• 0739c97 Merge branch 'init-com-dcb' into 'master'
• 957a837 initialize dcb struct on windows
• d388391 (cargo-release) start next development iteration 4.0.1-alpha.0
• Additional commits viewable in compare view

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