dep: bump solargraph from 0.40.2 to 0.40.3

Bumps solargraph from 0.40.2 to 0.40.3.

Changelog

Sourced from solargraph's changelog.

0.40.3 - February 7, 2021

• Simplify and allow to configure rubocop formatter (#403)
• Type checker shows tag in param type errors (#398)
• Handle bare private_constant (#408)
• Type checker handles splatted variables (#396)

Commits

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