Make BuildUrl an extension

[alexeyzimarev]

• Split the type for request parameters and default parameters

• Default parameters collection locks for concurrent updates (fixed DefaultParameters collection is not read-only #2025)

• Add default parameters to the interface

• Make BuildUrl a public extension (fixes Make BuildUri public #2026)

• Change authenticator interface to use IRestClient

• Also fix the missing charset for url-encoded forms (fixes No charset in url-encoded form in RestSharp 109.0.1 #2037)

• Allow null parameter value in OAuth1 authenticator (fixes OAuth1 AddParameter/AddQueryParameter Empty Value Gets "Value Cannot Be null" Exception #2022)

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[nesc58]

RestSharp should be versioned with semantic versioning.

Changing ParametersCollection is a breaking change
new ParametersCollection(...) is not longer available. It must be replaced with new DefaultParameters(...) or new RequestParameters(...).

The changes are fine to me and reasonable but the version should be changed to 110.0.0. This will make the breaking change clear because it is not only a bug fix or added functionality. e.g. I am using version patterns like

<PackageVersion Include="RestSharp" Version="[109.0.1, 110.0.0)" />

to prevent other libraries installing a potential breaking version. The current change will break this pattern.

Is this fine for you to change the version to 110.0.0?

[alexeyzimarev]

Yes, the plan is to release the new major.