Require sorbet when setting up bundle

[vinistock]

Motivation

We need to require sorbet-runtime here because setting up the bundler happens before our regular require.

Also bumped the version to fix the v0.7.1 which is broken.

[github-actions]

Benchmark results in seconds (slowest at top)

          textDocument/completion average: 0.264764 std_dev: 0.005162
          textDocument/diagnostic average: 0.041654 std_dev: 0.009423
          textDocument/definition average: 0.004681 std_dev: 0.003072
      textDocument/selectionRange average: 0.003542 std_dev: 0.000483
   textDocument/documentHighlight average: 0.001812 std_dev: 0.000129
 textDocument/semanticTokens/full average: 0.001745 std_dev: 0.000281
            textDocument/codeLens average: 0.001734 std_dev: 0.000165
        textDocument/documentLink average: 0.001724 std_dev: 0.000104
      textDocument/documentSymbol average: 0.001721 std_dev: 9.2e-05
        textDocument/foldingRange average: 0.001604 std_dev: 0.000117
textDocument/semanticTokens/range average: 0.000873 std_dev: 5.5e-05
               codeAction/resolve average: 0.000647 std_dev: 6.6e-05
               textDocument/hover average: 0.000608 std_dev: 6.9e-05
           textDocument/inlayHint average: 0.0006 std_dev: 4.5e-05
          textDocument/formatting average: 6.9e-05 std_dev: 0.000299
    textDocument/onTypeFormatting average: 6.8e-05 std_dev: 4.2e-05
          textDocument/codeAction average: 3.9e-05 std_dev: 2.7e-05


================================================================================
Comparison with main branch:

 textDocument/semanticTokens/full unchanged
textDocument/semanticTokens/range unchanged
      textDocument/documentSymbol unchanged
        textDocument/foldingRange unchanged
          textDocument/formatting unchanged
          textDocument/diagnostic unchanged
        textDocument/documentLink unchanged
           textDocument/inlayHint unchanged
      textDocument/selectionRange unchanged
   textDocument/documentHighlight unchanged
               textDocument/hover unchanged
          textDocument/codeAction unchanged
    textDocument/onTypeFormatting unchanged
               codeAction/resolve unchanged
          textDocument/completion unchanged
            textDocument/codeLens unchanged
          textDocument/definition unchanged


================================================================================
Missing benchmarks:

RubyLsp::Requests::ShowSyntaxTree