3.9.0

Implemented enhancements:

• Add support for skippable (de)serialization handlers #1238 (bobvandevijver)
• added support for milliseconds in DateInterval deserialization #1234 (ivoba)

Fixed bugs:

• Do not load entities when deserializing if their identifier is not ex… #1247 (goetas)
• Do not use excluded fields when fetching entities #1246 (goetas)
• Ensure accessors are cached per property when using reflection #1237 (goetas)

Merged pull requests:

• remove missing deprecated removal on hasData #1245 (rflavien)
• Change return type of SerializerBuilder::build() to Serializer #1241 (icanhazstring)
• docs: add note about array key type being ignored when serializing #1235 (eduardoweiland)
• Sort packages in composer.json #1228 (simPod)
• fix xml embeddable data getReference for DoctrineObjectConstructor #1224 (gam6itko)
• fixed exception for strict_types #1222 (ivoba)