Upgrade Selenium minor to 3.7.0 (#186)

Author: christopheg

Dockerfile

@@ -262,8 +262,8 @@ RUN echo "${UBUNTU_FLAVOR}" > UBUNTU_FLAVOR \
 # Selenium latest
 #=================
 # Layer size: medium ~22 MB
-ARG SEL_DIRECTORY="3.6"
-ARG SEL_VER="3.6.0"
+ARG SEL_DIRECTORY="3.7"
+ARG SEL_VER="3.7.0"
 
 RUN echo $SEL_VER
 RUN  export SELBASE="https://selenium-release.storage.googleapis.com" \