fix: realm.Bone.DataTypes should be invokable, Invokable.TYPE.toSqlString() get wrong default length(1), DataType definitions

[JimmyDaddy]

• fix: realm.Bone.DataTypes should be invokable

// undefined
realm.Bone.DataTypes.INTEGER.UNSIGNED

• fix: Invokable.TYPE.toSqlString() get wrong default length(1)
  ref: https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Function/length
  The length property indicates the number of parameters expected by the function.

// INTEGER(1)
DataTypes.INTEGER.toSqlString();
// 0TEXT
DataTypes.TEXT.toSqlString();
// 0BLOB
DataTypes.BLOB.toSqlString();

• DataType.d.ts