Dependency upgrades.

Author: cknitt

.travis.yml

@@ -5,7 +5,7 @@ os:
   - linux
   - osx
 install:
-  - npm install --global esy@0.4.9
+  - npm install --global esy@0.5.6
   - esy install
 script:
   - esy build

docker/Dockerfile

@@ -4,4 +4,4 @@ RUN apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get install -y nodejs npm git rsync m4 curl \
   && rm -rf /var/lib/apt/lists/*
 
-RUN npm i -g esy@0.4.9
+RUN npm i -g esy@0.5.6