Summary

• version numbers for Github actions bumped to latest stable
• version of golangci-lint bumped to latest stable
• Go version bumped to 18.1 for compiling within CI.

Plugin has not been getting linted correctly for a while, but failing silently. I could not get this working via github actions after many tries. Instead I refactored the linter script to use the makefile instead of GH action. Downside, we won't get the nice inline errors in the Files changed view. Upside, it works for server and plugin and linter errors are reported. Errors appear in the CI log like:

Error: server/plugin_test.go:29:2: b declared but not used (typecheck)
	b := assert.Equal("Hello, world!", bodyString)
	^

Ticket Link

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