Add missing dependency to jackson-annotations library

In I69d239fbd7 testcontainers dependency was aligned to v1.15, since it
was bumped in: Ifc3e5b51cc.

However transitive dependency jackson-annotations was missed to be
added. As the consequence, the tests are failing with the message:

  Could not find a valid Docker environment.
  Please see logs and check configuration.

Change-Id: I70517d0714eecfcc16dd6a5530c33a25345ae78a

BUILD

diff --git a/BUILD b/BUILD
index 0a8e2d3..86efb59 100644
--- a/BUILD
+++ b/BUILD
@@ -40,6 +40,7 @@
     exports = PLUGIN_DEPS + PLUGIN_TEST_DEPS + [
         ":kafka-events__plugin",
         "@testcontainers-kafka//jar",
+        "//lib/jackson:jackson-annotations",
         "//lib/testcontainers",
         "//lib/testcontainers:docker-java-api",
         "//lib/testcontainers:docker-java-transport",