Update CSSLint

Updates the underlying parser library

Author: gdiggs

Dockerfile

@@ -8,7 +8,7 @@ RUN apk --update add nodejs git zlib zlib-dev ruby ruby-dev ruby-bundler less bu
     bundle install -j 4 && \
     apk del --purge build-base zlib zlib-dev && rm -fr /usr/share/ri
 
-ENV CSSLINT_SHA=0e7aeadd02f5babca5152993374043f9f736a116
+ENV CSSLINT_SHA=87aa604a4cbc5125db979576f1b09b35980fcf08
 RUN npm install -g codeclimate/csslint.git#$CSSLINT_SHA
 
 RUN adduser -u 9000 -D app