v0.2.0

FEATURE:

• Set zero-value as the default value for container types (list, dict) (#4)
• Add case-insensitive converting at the schema (#4)
• Add non-strict mode for the type system (#4)

BUGFIX:

• Fix the typo of automatic generating (such as eip, vip), and compatible with the old version (#4)
• Fix object schema class to object (such as unet schema) (#4)