Updated atom to v1.7.0

Signed-off-by: Michael Käufl <dockerfiles@c.michael-kaeufl.de>
diff --git a/atom/Dockerfile b/atom/Dockerfile
index 984e6a2..5f349c7 100644
--- a/atom/Dockerfile
+++ b/atom/Dockerfile
@@ -40,7 +40,7 @@
 	--no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
-ENV ATOM_VERSION 1.6.0
+ENV ATOM_VERSION 1.7.0
 
 # download the source
 RUN buildDeps=' \