Release Termdash v0.18.0.

[mum4k]

v0.18.0 - 08-Feb-2023

Added

• The gauge widget now supports drawing of a vertical threshold bar.
• The TextInput widget now supports an OnChange handler that allows user code to be notified when the content of the text input changes.

Changed

• Bump github.com/gdamore/tcell/v2 from 2.5.1 to 2.5.4.
• Bump github.com/mattn/go-runewidth from 0.0.13 to 0.0.14.
• Bump github.com/gdamore/tcell/v2 from 2.5.1 to 2.5.3.
• Bump github.com/gdamore/tcell/v2 from 2.5.1 to 2.5.2
• Change the Go version in go.mod to 1.20.
• Executed go mod tidy.
• CI now executes tests with Golang v1.20 only.

Removed

• Removed the Sourcegraph badge from the main page.

Fixed

• Formatted all Go files with gofmt from Golang v1.20.
• Fixed line coverage reporting.

[coveralls]

Pull Request Test Coverage Report for Build 2430

• 45 of 51 (88.24%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.02%) to 91.178%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
widgets/gauge/gauge.go	26	28	92.86%
widgets/textinput/options.go	0	4	0.0%
<!--	Total:	45	51	88.24%	-->

Totals
Change from base Build 2360:	-0.02%
Covered Lines:	8341
Relevant Lines:	9148

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💛 - Coveralls