fix(ci): need to upgrade test containers

see testcontainers/testcontainers-java#3574

Author: Anton Malinskiy

.github/workflows/ci.yml

@@ -1,7 +1,7 @@
 name: ci
 on: [ push, pull_request ]
 jobs:
-  deploy:
+  ci:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v1

buildSrc/src/main/kotlin/Versions.kt

@@ -37,7 +37,7 @@ object Versions {
     val guava = "26.0-jre"
     val rsync4j = "3.1.2-12"
     val sshj = "0.26.0"
-    val testContainers = "1.15.0-rc2"
+    val testContainers = "1.15.3"
     val jupiterEngine = "5.1.0"
     val jansi = "1.17.1"
     val scalr = "4.2"