devel/rubygem-grape-entity: Update to 0.9.0.

Required for gitlab-ce 13.12.
Changelog:
https://github.com/ruby-grape/grape-entity/blob/master/CHANGELOG.md

devel/rubygem-grape-entity/Makefile

 PORTNAME=	grape-entity
-PORTVERSION=	0.8.1
+PORTVERSION=	0.9.0
 PORTEPOCH=	1
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG

devel/rubygem-grape-entity/distinfo

-TIMESTAMP = 1598457049
-SHA256 (rubygem/grape-entity-0.8.1.gem) = 7bbd5c2c2a2c4dedf7e6ad0cce04da0efbed10ef488941afbdc708043887287c
-SIZE (rubygem/grape-entity-0.8.1.gem) = 44032
+TIMESTAMP = 1621457801
+SHA256 (rubygem/grape-entity-0.9.0.gem) = d9cda1edcdbe53e5851c4ce0087c4b7319b4227374f50da48d737b2adb18136b
+SIZE (rubygem/grape-entity-0.9.0.gem) = 45568