Update chakracore v8.10.0 to v8.11.1 w/ Yarn 1.6.0

Author: PeterDaveHello

chakracore/8/Dockerfile

@@ -3,7 +3,7 @@ FROM buildpack-deps:jessie
 RUN groupadd --gid 1000 node \
   && useradd --uid 1000 --gid node --shell /bin/bash --create-home node
 
-ENV NODE_VERSION 8.10.0
+ENV NODE_VERSION 8.11.1
 
 RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && case "${dpkgArch##*-}" in \
@@ -17,7 +17,7 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt \
   && ln -s /usr/local/bin/node /usr/local/bin/nodejs
 
-ENV YARN_VERSION 1.5.1
+ENV YARN_VERSION 1.6.0
 
 RUN set -ex \
   && for key in \