chore(deps): update roslynator to v4.8.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Roslynator.Analyzers	4.7.0 -> 4.8.0
Roslynator.CodeAnalysis.Analyzers	4.7.0 -> 4.8.0
Roslynator.Formatting.Analyzers	4.7.0 -> 4.8.0

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Release Notes

dotnet/roslynator (Roslynator.Analyzers)

v4.8.0

Added

• Add analyzer "Add/remove blank line between switch sections" (RCS0061) (PR)
  • Option (required): roslynator_blank_line_between_switch_sections = include|omit|omit_after_block
  • Make analyzer RCS0014 obsolete
• Add analyzer "Declare explicit/implicit type" (RCS1264) (PR)
  • Required option: roslynator_use_var = always | never | when_type_is_obvious
  • This analyzer consolidates following analyzers (which are made obsolete):
    • RCS1008
    • RCS1009
    • RCS1010
    • RCS1012
    • RCS1176
    • RCS1177
• Add code fix "Declare as nullable" (PR)
  • Applicable to: CS8600, CS8610, CS8765 and CS8767
• Add option roslynator_use_collection_expression = true|false (PR)
  • Applicable to RCS1014 and RCS1250

Changed

• Replace type declaration's empty braces with semicolon (RCS1251 (PR, PR)
• [TestFramework] Bump MSTest.TestFramerk to 3.1.1 (PR)
• [TestFramework] Bump xunit.assert to 2.6.2 (PR)
• Bump Roslyn to 4.7.0 (PR)

Fixed

• Fix analyzer RCS1262 (PR)
• Fix analyzer RCS1213 (PR)

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