new: [postgres] upgrade ``pgm`` to version ``0.0.6``

This will allow easier usage of ``pgm`` through ``docker {exec,run}``.

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

postgres/build/Dockerfile

@@ -25,7 +25,7 @@ USER root
 
 RUN apk add curl
 
-RUN curl -L https://raw.githubusercontent.com/0k/pgm/0.0.5/bin/pgm > /bin/pgm && \
+RUN curl -L https://raw.githubusercontent.com/0k/pgm/0.0.6/bin/pgm > /bin/pgm && \
     chmod +x /bin/pgm
 
 FROM common