v0.10.0

Changes:

• Added Serialize/Deserialize impls for Value type when serde feature is enabled. Fixes #27.
• Floats are now represented as native f32/f64 in Value, rather than as raw bits. Fixes #26.
• Added tokio_rustls support. Fixes #24.
• Fix no_snake_case warning when using derive. Fixes #23.
• Added a SelectBuilder type that can help assemble large dynamic SELECT queries piece-by-piece.