Update dependencies 2020-08-08, drop MSRV

[ClementTsang]

Description

A description of the change and what it does. If relevant, please provide screenshots of what results from the change:

Update dependencies to most recent versions if applicable. Refactor to deal with breaking changes. Drop MSRV due to dependency issues, just support stable and later.

Issue

If applicable, what issue does this address?

Closes: #

Type of change

Remove the irrelevant ones:

• Other (something else - please specify if relevant)

Test methodology

If required, please state how this was tested:

The main point that might have broken is the text alignments, due to the tui-rs update having breaking changes. As such, most of the tests are focused on this.

• Test general look
• Test help
• Test dd
• Test basic
• Test battery

Furthermore, there was a sysinfo update, so check those...

• Test sysinfo on Linux
• Test sysinfo on macOS
• Test sysinfo on Windows

Furthermore, please tick which platforms this change was tested on:

• Windows
• macOS
• Linux

Checklist

If relevant, see if the following have been met:

• Change has been tested to work
• Areas your change affects have been linted using rustfmt
• Code has been self-reviewed
• Code has been tested and no new breakage is introduced unless intended
• Passes CI tests
• Documentation has been added/updated if needed (README, help menu, etc.)
• No merge conflicts arise from the change

Other information

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