dep: bump solargraph from 0.40.0 to 0.40.1

Bumps solargraph from 0.40.0 to 0.40.1.

Changelog

Sourced from solargraph's changelog.

0.40.1 - December 28, 2020

• Use temp directory for RuboCop formatting (#397)
• NodeMethods reads splatted hashes (#396)

Commits

• 22e3825 Update changelog
• 5d5f2cc Allow failures in Ruby 3.0 pending stable support
• d7b5f3a Add Ruby 3.0 to Travis
• 66dd6af Use :LIST node type in Ruby 2.7
• 1d86c01 Legacy kwsplat handling
• 81d2fc2 NodeMethods reads splatted hashes (#396)
• 33e5c9d Minor refactoring
• 1f98725 Use temp directory for RuboCop formatting (#397)
• See full diff in compare view