[RUN ALL RSPEC] Update grape gem to 1.5.2
What does this MR do?
Related issue: #257438 (closed)
Fixes Ruby 2.7 warnings
CHANGELOG: https://github.com/ruby-grape/grape/blob/master/CHANGELOG.md
Edited by Igor Drozdov
Related issue: #257438 (closed)
Fixes Ruby 2.7 warnings
CHANGELOG: https://github.com/ruby-grape/grape/blob/master/CHANGELOG.md