dependency updates

Squashed commit of the following:

commit be5808240d03ae8d3a0238c6597d431b317796e0
Merge: cb0cc67 8103734
Author: Henrik Friedrichsen <henrik@affekt.org>
Date:   Mon Oct 19 00:27:21 2020 +0200

    Merge remote-tracking branch 'origin/dependabot/cargo/toml-0.5.7' into deps

commit cb0cc67e92d89516d52686a67dff7ff5c04d5495
Merge: b8eeb1a 68856c6
Author: Henrik Friedrichsen <henrik@affekt.org>
Date:   Mon Oct 19 00:27:12 2020 +0200

    Merge remote-tracking branch 'origin/dependabot/cargo/strum_macros-0.19.4' into deps

commit b8eeb1ab1e105886caec337d4f956b0ec5fc4296
Merge: d490fce 9139195
Author: Henrik Friedrichsen <henrik@affekt.org>
Date:   Mon Oct 19 00:27:05 2020 +0200

    Merge remote-tracking branch 'origin/dependabot/cargo/serde-1.0.117' into deps

commit d490fce784d43eb54615edaae23a2d6bfaf64cc5
Merge: ee72425 51ecfbc
Author: Henrik Friedrichsen <henrik@affekt.org>
Date:   Mon Oct 19 00:26:53 2020 +0200

    Merge remote-tracking branch 'origin/dependabot/cargo/regex-1.4.1' into deps

commit ee72425de2ee0137a383c0908ae56d469b9d735e
Author: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date:   Sun Oct 18 22:19:04 2020 +0000

    Bump crossbeam-channel from 0.4.4 to 0.5.0

    Bumps [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) from 0.4.4 to 0.5.0.
    - [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
    - [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
    - [Commits](https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-channel-0.4.4...crossbeam-channel-0.5.0)

    Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

commit 51ecfbcb26f2931c74ccacd408224cefdccd9130
Author: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date:   Sun Oct 18 22:18:44 2020 +0000

    Bump regex from 1.3.9 to 1.4.1

    Bumps [regex](https://github.com/rust-lang/regex) from 1.3.9 to 1.4.1.
    - [Release notes](https://github.com/rust-lang/regex/releases)
    - [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
    - [Commits](https://github.com/rust-lang/regex/compare/1.3.9...1.4.1)

    Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

commit 68856c6b42fd4411218a906b603c658bf4634038
Author: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date:   Sun Oct 18 22:18:17 2020 +0000

    Bump strum_macros from 0.17.1 to 0.19.4

    Bumps [strum_macros](https://github.com/Peternator7/strum) from 0.17.1 to 0.19.4.
    - [Release notes](https://github.com/Peternator7/strum/releases)
    - [Changelog](https://github.com/Peternator7/strum/blob/master/CHANGELOG.md)
    - [Commits](https://github.com/Peternator7/strum/commits)

    Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

commit 81037349e712317a1cd2b47c424e58535e97b3fd
Author: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date:   Sun Oct 18 22:18:03 2020 +0000

    Bump toml from 0.5.6 to 0.5.7

    Bumps [toml](https://github.com/alexcrichton/toml-rs) from 0.5.6 to 0.5.7.
    - [Release notes](https://github.com/alexcrichton/toml-rs/releases)
    - [Commits](https://github.com/alexcrichton/toml-rs/compare/0.5.6...0.5.7)

    Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

commit 91391958b2d1d46e4038ceb16c84219a8ce5c373
Author: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date:   Sun Oct 18 22:17:34 2020 +0000

    Bump serde from 1.0.116 to 1.0.117

    Bumps [serde](https://github.com/serde-rs/serde) from 1.0.116 to 1.0.117.
    - [Release notes](https://github.com/serde-rs/serde/releases)
    - [Commits](https://github.com/serde-rs/serde/compare/v1.0.116...v1.0.117)

    Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.toml

@@ -17,7 +17,7 @@ maintenance = { status = "actively-developed" }
 clap = "2.33.0"
 chrono = "0.4"
 reqwest = "0.9"
-crossbeam-channel = "0.4"
+crossbeam-channel = "0.5"
 platform-dirs = "0.3.0"
 failure = "0.1"
 fern = "0.5"
@@ -41,8 +41,8 @@ rand = "0.7"
 webbrowser = "0.5"
 clipboard = { version = "0.5", optional = true }
 url = "1.7"
-strum = "0.17.1"
-strum_macros = "0.17.1"
+strum = "0.19.5"
+strum_macros = "0.19.4"
 libc = "0.2"
 regex = "1"