Updated gem#3

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arthurWD wants to merge 4 commits intomock-server:masterfrom

arthurWD:master

Commits on Mar 13, 2018

Make distinction in keys for value types in body
Arthur Dingemans
committed
Convert strings to booleans
Arthur Dingemans
committed

Commits on May 16, 2018

Update to Rest Server version
Arthur Dingemans
committed

Commits on Mar 18, 2019

Update rubgems version
Arthur Dingemans
committed