Android and Java 8

Hi!

Google don't include Java 8 Time API in Android's standard library.
How can we deal with? I use threetenabp backport, will it work with nitrite?

java.lang.NoClassDefFoundError: Failed resolution of: Ljava/time/Instant;
                                             at com.fasterxml.jackson.datatype.jsr310.JavaTimeModule.<init>(JavaTimeModule.java:139)
                                             at org.dizitart.kno2.KNO2JacksonMapper.<init>(KNO2JacksonMapper.kt:35)
                                             at org.dizitart.kno2.Builder.createNitriteBuilder$potassium_nitrite(Builder.kt:114)
                                             at org.dizitart.kno2.BuilderKt.nitrite(Builder.kt:141)
                                             at org.dizitart.kno2.BuilderKt.nitrite$default(Builder.kt:138)

This problem could be fixed via using custom nitriteMapper like this:

    fun database(): Nitrite = nitrite {
        file = File("database")
        nitriteMapper = object : JacksonMapper() {
            init {
                objectMapper.registerModule(KotlinModule())
                objectMapper.registerModule(ThreetenabpTimeModule())
                objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
            }
        }
    }

[anidotnet]

kno2 already has its own NitriteMapper - KNO2JacksonMapper which is already registered with kno2, so you don't have to do nothing about kotlin data classes and java time api.

But if you are on android, and using backport, then your solution is the way forward.

In next iteration snapshot I am opening up KNO2JacksonMapper from internal to public so that you can extend from it instead of JacksonMapper.

[anidotnet]

You can now have it in 2.2.0-SNAPSHOT

[Jaszczur1337]

If you could include it in the readme, i wasted so much time on this

[anidotnet]

@Jaszczur1337 what do you like me to include in readme?