Update dependencies and samples

[kibertoad]

PR checklist

• Read the contribution guidelines.
• Ran the shell script under ./bin/ to update Petstore sample so that CIs can verify the change. (For instance, only need to run ./bin/{LANG}-petstore.sh and ./bin/security/{LANG}-petstore.sh if updating the {LANG} (e.g. php, ruby, python, etc) code generator or {LANG} client's mustache templates). Windows batch files can be found in .\bin\windows\.
• Filed the PR against the correct branch: 3.0.0 branch for changes related to OpenAPI spec 3.0. Default: master.

Description of the PR

Bump dependency versions for a variety of HTTP client libraries and update samples.

[HugoMario]

thanks @kibertoad , i'll need to take a time to update samples and verify your changes before merge them.

[HugoMario]

thanks @kibertoad !!