devel/rubygem-erb: Update to 2.2.3

Changes:	https://github.com/ruby/erb/blob/master/NEWS.md

devel/rubygem-erb/Makefile

 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 
 PORTNAME=	erb
-PORTVERSION=	2.2.2
+PORTVERSION=	2.2.3
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 

devel/rubygem-erb/distinfo

-TIMESTAMP = 1611856632
-SHA256 (rubygem/erb-2.2.2.gem) = d7ad86810b71e121c91b3a97c49ebaa23cab468191554d95bddd7f42251cb673
-SIZE (rubygem/erb-2.2.2.gem) = 17408
+TIMESTAMP = 1618320890
+SHA256 (rubygem/erb-2.2.3.gem) = cbc18b3745fa1794d245db2e64731c681704f350f89eca725275b62075b84f3b
+SIZE (rubygem/erb-2.2.3.gem) = 17920