use official docker image php 7.4

loganhenson · loganhenson · commit b6dfd9529eba · 2019-12-06T11:52:59.000-06:00
diff --git a/environments/php7.4/Dockerfile b/environments/php7.4/Dockerfile
@@ -1,3 +1,3 @@
-FROM php:7.4.0RC4-cli
+FROM php:7.4.0-cli
 WORKDIR "/home/vector"
 CMD ["./vendor/bin/phpunit"]
