feat: support env ALIBABA_CLOUD_SECURITY_TOKEN

[yndu13]

You need to complete

• unit tests and/or feature tests
• documentation is changed or added

[codecov-commenter]

Codecov Report

Merging #52 (e40f5b9) into master (ec7d32f) will increase coverage by 0.06%.
The diff coverage is 100.00%.

❗ Current head e40f5b9 differs from pull request most recent head 72708e9. Consider uploading reports for the commit 72708e9 to get more accurate results

@@             Coverage Diff              @@
##             master      #52      +/-   ##
============================================
+ Coverage     85.21%   85.27%   +0.06%     
- Complexity      500      503       +3     
============================================
  Files            44       44              
  Lines          1752     1766      +14     
  Branches        112      113       +1     
============================================
+ Hits           1493     1506      +13     
- Misses          222      223       +1     
  Partials         37       37              

Flag	Coverage Δ
unittest	85.27% <100.00%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ovider/EnvironmentVariableCredentialsProvider.java	100.00% <100.00%> (ø)
...n/java/com/aliyun/credentials/utils/AuthUtils.java	86.90% <100.00%> (+0.82%)	⬆️

... and 1 file with indirect coverage changes