Bump all recipes depending on icu to migrate to version 66.

dev-lang/php/php-5.6.37.recipe

@@ -6,7 +6,7 @@ popular websites in the world."
 HOMEPAGE="https://php.net/"
 COPYRIGHT="2001-2018 PHP Group"
 LICENSE="PHP License v3.01"
-REVISION="6"
+REVISION="7"
 SOURCE_URI="https://php.net/get/php-$portVersion.tar.bz2/from/this/mirror"
 CHECKSUM_SHA256="886ad63d05d94ea3e54322691aadea0cf1d4bcdb4450b02fe300e5b570788b23"
 SOURCE_FILENAME="php-$portVersion.tar.bz2"
@@ -36,7 +36,7 @@ REQUIRES="
 	lib:libcrypto
 	lib:libcurl
 	lib:libfreetype
-	lib:libicuuc
+	lib:libicuuc >= 66
 	lib:libjpeg
 	lib:libnghttp2
 	lib:libpcre
@@ -51,7 +51,7 @@ BUILD_REQUIRES="
 	devel:libcrypto
 	devel:libcurl
 	devel:libfreetype
-	devel:libicuuc
+	devel:libicuuc >= 66
 	devel:libjpeg
 	devel:libnghttp2
 	devel:libpcre