csstidy: update to latest Git HEAD

707feae parse_css: do not omit white space in url() property values

Ref: https://github.com/openwrt/luci/commit/69608199973651baf585d24a095edf8c0c42e21f#commitcomment-52088358
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

contrib/package/csstidy/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=https://github.com/jow-/csstidy-cpp.git
-PKG_SOURCE_DATE:=2018-12-20
-PKG_SOURCE_VERSION:=1d5620149ae35c0d49fb2014d4e63a23ecfb6f69
-PKG_MIRROR_HASH:=3210d475f6ae966d4dfcd3e1f7fcbf0ad9507a37878d50de015ffe795c1d160e
+PKG_SOURCE_DATE:=2021-06-13
+PKG_SOURCE_VERSION:=707feaec556c40c999514a598b1a1ea5b50826c6
+PKG_MIRROR_HASH:=a6db35de692d1b94561e725634ce410b75f5f7e26dc6f3fc92931813c0721ded
 
 PKG_LICENSE:=LGPL-2.1
 PKG_LICENSE_FILES:=COPYING