Add extra capabilities for on request handling

[AvdLee]

During updating our internal projects to the latest major release of Mocker it turned out that the on-request handler could be improved with a few common scenarios. We now offer callbacks for:

• Empty on request handlers, no interest in request or body arguments
• Top-level collection body arguments
• JSON Dictionary body arguments
• Decodable body arguments
• URLRequest-only containing callback

I'm convinced this will level up the possibilities our framework offers to all our users.
Secondly, we didn't test all scenarios, so I added a few more to increase coverage.

[wetransferplatform]

	Warnings
⚠️	'onRequest' is deprecated: Use onRequestHandler instead.
⚠️	'onRequest' is deprecated: Use onRequestHandler instead.

	Messages
📖	View more details on Bitrise
📖	MockerTests: Executed 30 tests (0 failed, 0 retried, 0 skipped) in 1.778 seconds

SwiftLint found issues

Severity	File	Reason
Warning	OnRequestHandler.swift:47	Line should be 140 characters or less: currently 149 characters (line_length)
Error	OnRequestHandler.swift:57	Line should be 160 characters or less: currently 168 characters (line_length)
Error	OnRequestHandler.swift:73	Line should be 160 characters or less: currently 163 characters (line_length)
Warning	Mock.swift:87	Computed properties should declare first the getter and then the setter. (computed_accessors_order)
Error	Mock.swift:8	Line should be 160 characters or less: currently 177 characters (line_length)
Warning	Mock.swift:49	Line should be 140 characters or less: currently 155 characters (line_length)
Error	Mock.swift:81	Line should be 160 characters or less: currently 211 characters (line_length)
Error	Mock.swift:84	Line should be 160 characters or less: currently 208 characters (line_length)
Error	Mock.swift:95	Line should be 160 characters or less: currently 217 characters (line_length)
Error	Mock.swift:104	Line should be 160 characters or less: currently 287 characters (line_length)
Warning	Mock.swift:133	Line should be 140 characters or less: currently 142 characters (line_length)
Warning	Mock.swift:140	Line should be 140 characters or less: currently 141 characters (line_length)
Error	Mock.swift:147	Line should be 160 characters or less: currently 246 characters (line_length)
Error	Mock.swift:148	Line should be 160 characters or less: currently 236 characters (line_length)
Warning	Mock.swift:159	Line should be 140 characters or less: currently 150 characters (line_length)
Warning	Mock.swift:160	Line should be 140 characters or less: currently 153 characters (line_length)
Warning	Mock.swift:196	Line should be 140 characters or less: currently 159 characters (line_length)
Error	Mock.swift:206	Line should be 160 characters or less: currently 168 characters (line_length)
Warning	MockerTests.swift:163	Line should be 140 characters or less: currently 151 characters (line_length)
Warning	MockerTests.swift:181	Line should be 140 characters or less: currently 149 characters (line_length)
Warning	MockerTests.swift:239	Line should be 140 characters or less: currently 154 characters (line_length)
Warning	MockerTests.swift:52	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:71	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:94	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:116	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:149	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:165	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:183	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:206	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:259	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:520	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)
Warning	MockerTests.swift:554	Chained function calls should be either on the same line, or one per line. (multiline_function_chains)

Code Coverage Report

Name	Coverage
Mocker	88.59%	✅

Generated by 🚫 Danger Swift against b0d713e

[BasThomas]

Is this breaking change expected after already having released a v3?

[wetransferplatform]

Congratulations! 🎉 This was released as part of Release 3.0.1 🚀

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