Update diffy cli to 0.1.23

Author: Joe Cardella

src/Dockerfile

@@ -1,5 +1,5 @@
 FROM alpine:latest
-ARG DIFFY_VERSION=0.1.22
+ARG DIFFY_VERSION=0.1.23
 RUN apk update && \
     apk add bash git openssh openssl php php-openssl php-phar php-iconv && \
     wget -O /usr/local/bin/diffy https://github.com/DiffyWebsite/diffy-cli/releases/download/${DIFFY_VERSION}/diffy.phar && \