development-dependency: bump solargraph from 0.41.2 to 0.42.1

Bumps solargraph from 0.41.2 to 0.42.1.

Changelog

Sourced from solargraph's changelog.

0.42.1 - June 11, 2021

• YardMap#change sets new directory (#445)

0.42.0 - June 11, 2021

• Improve YardMap efficiency
• Bench includes Workspace for cataloging
• Initialize confirms static features from options (#436)
• Enable simple repairs without incremental sync (#416)
• Discard unrecognized client responses
• Notify on use of closest match for core (#390)

Commits

• 74a398e YardMap#change sets new directory (#445)
• 6a890f6 Notify on use of closest match for core (#390)
• 2a1928d Discard unrecognized client responses
• ae07ad0 Max method length 25
• 78e6a41 Suppress RuboCop spam
• 71eb479 Whitespace
• ee5b3df Enable simple repairs without incremental sync (#416)
• 39dbe37 No Ruby 3 for OSX
• 26a4f69 Revised 3.0 tests in Travis CI
• eda5626 Initialize confirms static features from options (#436)
• Additional commits viewable in compare view

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