Fix #250

- Updated the `body` function in `Pact.kt` to use a safer casting approach with `as?` instead of inline reified type parameters, improving type safety.
- Modified the `serializerWith` and `serializerAsDefault` functions in `Utils.kt` to remove inline reified type parameters, simplifying the function signatures while maintaining functionality.

These changes enhance type handling and simplify the serialization utility methods in the pact-jvm-mock library.

pact-jvm-mock/src/main/kotlin/io/github/ludorival/pactjvm/mock/Pact.kt

@@ -39,7 +39,8 @@ data class Pact(
         ) {
 
             @JsonIgnore
-            inline fun <reified T> body() : T? = if (body is T) body else null
+            @Suppress("UNCHECKED_CAST")
+            fun <T> body() : T? = body as? T
             enum class Method {
                 GET, HEAD, POST, PUT, PATCH, DELETE, OPTIONS, TRACE
             }

pact-jvm-mock/src/main/kotlin/io/github/ludorival/pactjvm/mock/Utils.kt

@@ -5,13 +5,13 @@ import com.fasterxml.jackson.databind.JsonSerializer
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.SerializerProvider
 
-inline fun <reified T> serializerWith(crossinline supplier: (JsonGenerator) -> Unit) = object : JsonSerializer<T>() {
+ fun <T> serializerWith( supplier: (JsonGenerator) -> Unit) = object : JsonSerializer<T>() {
     override fun serialize(value: T, gen: JsonGenerator, serializers: SerializerProvider?) {
         supplier(gen)
     }
 }
 
-inline fun <reified T> serializerAsDefault(defaultValue: String) =
+fun < T> serializerAsDefault(defaultValue: String) =
     serializerWith<T> { it.writeString(defaultValue) }