Add missing test files.

tests/versionClashes/aporiaScenario/aporiaScenario.nimble

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+# Package
+
+version       = "0.1.0"
+author        = "Dominik Picheta"
+description   = " "
+license       = "MIT"
+
+# Dependencies
+
+requires "nim >= 0.15.2"
+requires "https://github.com/nimble-test/packagea.git#head"
+requires "https://github.com/nimble-test/packagea.git >= 0.5"
+

tests/versionClashes/readme.md

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+Tests to ensure that the following errors are correct.
+
+```
+Cannot satisfy dependency on gtk2 1.0 and gtk2 1.1
+```