[V2] SimpleType not handled well under latest metadata WSDL

[Yoshihisa-Matsumoto]

When I execute wsdl2schema.ts (2.0/src/api/wsdl/wsdl2schema.ts) and imported latest metadata WSDL ver58,
it didn't handle simpleType restriction very well.

I checked the program, and found extractComplexTypes function was root cause.

From: (Line#180)
const rs = simpleType.restriction ?? simpleType['xsd:restriction'];

To:
let rs = simpleType.restriction;
if (rs.$.base.length == 0 || !rs.$.base.includes(':'))
rs = simpleType['xsd:restriction'];

simpleType.restriction is not empty and simpleType.restrinction.base has empty string
So original code returned base type as undefined , which caused tons of typescript error on generated file.

[Yoshihisa-Matsumoto]

detail :
some simpleType JSON would be as follows.
as you see, restriction.$.base is empty string, so original code always set 'undefined'

{
'$': { name: 'ID' },
'xsd:restriction': {
'$': { base: 'xsd:string' },
'xsd:length': [Object: null prototype] { '$': [Object: null prototype] },
'xsd:pattern': [Object: null prototype] { '$': [Object: null prototype] },
enumeration: [],
'xsd:enumeration': []
},
restriction: { '$': { base: '' }, enumeration: [], 'xsd:enumeration': [] }
}