fix: use legacy issue-reporting package name for compatibility

[Kolos65]

Pointfree packages use the old name of swift-issue-reporting in their package manifest:

• TCA / Package@swift-6.0.swift
• TCA / Package.swift
• swift-dependencies / Package@swift-6.0.swift
• etc...

all have

.package(url: "https://github.com/pointfreeco/xctest-dynamic-overlay", from: "1.3.0")

in the manifest.

This means, that if Mockable uses the new swift-issue-reporting package name instead of the old one, you will get the following duplication error if you try to depend on Mockable and TCA together:

multiple similar targets 'IssueReporting', 'IssueReportingTestSupport', 'XCTestDynamicOverlay' appear in package 'swift-issue-reporting' and 'xctest-dynamic-overlay', this may indicate that the two packages are the same and can be de-duplicated by using mirrors. if they are not duplicate consider using the moduleAliases parameter in manifest to provide unique names

In order to avoid conflicts with pointfree packages which are quite popular, this PR renames the dependency to follow them in this regard.