Test oracle support on 7.3

Signed-off-by: Joas Schilling <coding@schilljs.com>

before_install_oracle.sh

@@ -11,6 +11,18 @@ sudo ln -s /usr/include/oracle/11.2/client64/ /usr/lib/oracle/11.2/client64/rdbm
 sudo apt-get install -qq --force-yes libaio1
 if [ "$TRAVIS_PHP_VERSION" == "7" ] ; then
   printf "/usr/lib/oracle/11.2/client64\n" | pecl install oci8
+elif [ "$TRAVIS_PHP_VERSION" == "7.3" ] ; then
+  mkdir /tmp/oci8
+  cd /tmp/oci8
+  wget https://pecl.php.net/get/oci8-2.2.0.tgz
+  tar -xzf oci8-2.2.0.tgz
+  cd oci8-2.2.0
+  phpize
+  ORACLE_HOME=/usr/lib/oracle/11.2/client64
+  ./configure
+  make install
+
+  echo "extension=oci8.so" >> /home/travis/.phpenv/versions/$(phpenv version-name)/etc/php.ini
 else
   mkdir /tmp/oci8
   cd /tmp/oci8