v0.3.0

• Introduces higher-kinded contextual type parameter to DBEngine and DBFunction to allow for integration of libraries which use effect types.
• Introduces Doobie module which uses Doobie as the underlying library. #11
• Refactors core module to simplify usage in the client code. #51
• Introduces error handling with Either to make exceptions explicit. #105
• Replaces Scala 2.11 support for Scala 2.13 in order to be able to use recently released versions of compatible dependencies, and in order to make sure we do not depend on vulnerable dependencies. This also makes the code future-proofed as Scala 3 is backwards compatible with Scala 2.13. #104
• Fixes dependency propagation in DBSchema. #99