[4.x] backport bugfix for Parsers #240 SnakeYaml NoClassDefFoundError (#242)

Author: rbygrave

avaje-config/src/main/java/io/avaje/config/Parsers.java

@@ -27,7 +27,7 @@ private void initYamlParser() {
     YamlLoader yamlLoader =
         modules
             .findModule("io.avaje.config")
-            .map(m -> modules.findModule("org.yaml.snakeyaml").isPresent())
+            .filter(m -> modules.findModule("org.yaml.snakeyaml").isPresent())
             .map(m -> (YamlLoader) new YamlLoaderSnake())
             .orElseGet(
                 () -> {