release 0.5.0

[KeRan213539]

The branch of 0.2.0 is master-0.2.0. If your PR is to solve the problem of 0.2.0, please submit the PR to it.
Please do not create a Pull Request without creating an issue first.

What is the purpose of the change

release 0.5.0

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist.
• Run `mvn clean compile --batch-mode -DskipTests=false -Dcheckstyle.skip=false -Drat.skip=false -Dmaven.javadoc.skip=true to make sure basic checks pass.

[codecov-commenter]

Codecov Report

Merging #930 (4a1aab6) into master (e2da767) will decrease coverage by 0.29%.
The diff coverage is 25.37%.

@@             Coverage Diff              @@
##             master     #930      +/-   ##
============================================
- Coverage     21.50%   21.20%   -0.30%     
- Complexity      424      434      +10     
============================================
  Files           149      149              
  Lines          4683     4791     +108     
  Branches        712      726      +14     
============================================
+ Hits           1007     1016       +9     
- Misses         3593     3690      +97     
- Partials         83       85       +2     

Flag	Coverage Δ
unit	21.20% <25.37%> (-0.30%)	⬇️

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

Impacted Files	Coverage Δ
.../org/apache/dubbo/admin/common/util/SyncUtils.java	0.00% <0.00%> (ø)
...pache/dubbo/admin/config/SwaggerConfiguration.java	0.00% <ø> (-100.00%)	⬇️
...va/org/apache/dubbo/admin/model/domain/Entity.java	4.87% <0.00%> (-1.01%)	⬇️
.../org/apache/dubbo/admin/model/domain/Provider.java	0.00% <0.00%> (ø)
...pache/dubbo/admin/model/domain/RegistrySource.java	0.00% <0.00%> (-100.00%)	⬇️
...registry/metadata/impl/NacosMetaDataCollector.java	2.56% <0.00%> (-0.14%)	⬇️
.../dubbo/admin/service/impl/ConsumerServiceImpl.java	3.33% <0.00%> (-0.52%)	⬇️
...dmin/service/impl/InstanceRegistryQueryHelper.java	3.03% <0.00%> (-0.82%)	⬇️
.../dubbo/admin/service/impl/ProviderServiceImpl.java	0.60% <0.00%> (-0.08%)	⬇️
...che/dubbo/admin/utils/ApiDocsDubboGenericUtil.java	19.11% <0.00%> (-0.29%)	⬇️
... and 15 more

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