feat: 支持 appAuthToken 代调用模式

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 92.49%. Comparing base (323bc3d) to head (6873ae8). Report is 3 commits behind head on master.

Files	Patch %	Lines
src/alipay.ts	85.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #128 +/- ## ========================================== - Coverage 94.43% 92.49% -1.94% ========================================== Files 6 6 Lines 1239 1306 +67 Branches 164 172 +8 ========================================== + Hits 1170 1208 +38 - Misses 69 98 +29 ```

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