Bump grape from 1.2.2 to 1.2.3

[dependabot-preview]

Bumps grape from 1.2.2 to 1.2.3.

Changelog

Sourced from grape's changelog.

1.2.3 (2019/01/16)

Features

• #1850: Adds same_as validator - [glaucocustodio](https://github.com/glaucocustodio).
• #1833: Allows to set the ParamBuilder globally - [myxoh](https://github.com/myxoh).

Fixes

• #1852: allow_blank called after as when the original param is not blank - [glaucocustodio](https://github.com/glaucocustodio).
• #1844: Enforce :tempfile to be a Tempfile object in File validator - [Nyangawa](https://github.com/Nyangawa).

Commits

• 663e88b Preparing for release, 1.2.3.
• b645fb4 fix: validators checking aliased param instead of original one (#1852)
• d2edd88 Merge pull request #1850 from glaucocustodio/same-as-validator
• 2efbd01 Add same_as validator
• b368380 Merge pull request #1844 from Nyangawa/fix-file-validator
• d307fa1 fix: enforce tempfile to be a Tempfile object
• 766cdb5 Allows to set a global ParamBuilder (#1833)
• 669221b Merge pull request #1840 from dblock/coveralls-reborn
• b4f4d2a Use coveralls-reborn for rails-edge.
• e1a0879 Preparing for next developer iteration, 1.2.3.
• See full diff in compare view

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