Fix checkver path, update to 1.58.0

[simonmarty]

• Fix checkver path to use simpler the built-in GitHub version lookup logic (docs)
• Update to 1.58.0

Running tests from 'Scoop-Bucket.Tests.ps1'
Describing Code Syntax
  [+] PowerShell code files do not contain syntax errors 64ms (5ms|59ms)

Describing Style constraints for non-binary project files
  [+] files do not contain leading UTF-8 BOM 32ms (30ms|2ms)
  [+] files end with a newline 3ms (3ms|1ms)
  [+] file newlines are CRLF 5ms (5ms|1ms)
  [+] files have no lines containing trailing whitespace 7ms (7ms|1ms)
  [+] any leading whitespace consists only of spaces (excepting makefiles) 9ms (8ms|1ms)

Describing Manifest validates against the schema
  [+] C:\Users\simon\Documents\Workspace\scoop-bucket\bucket\smithy-cli.json 493ms (489ms|4ms)
Tests completed in 831ms
Tests Passed: 7, Failed: 0, Skipped: 0, Inconclusive: 0, NotRun: 0

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