Create Unit Tests

[Unknown6656]

• [x] Add Appveyor CI
• [x] Publish TestRunner repository: https://github.com/unknown6656/TestRunner
  • [x] NuGet: unknown6656/TestRunner@d70240ba254392b12bacda26521ed1d647ee101e
• [ ] Write cross-platform tests
  • [ ] Variant conversion
  • [ ] Variable handling
  • [ ] Expression parser
  • [ ] Tests for Au3 specs
    • [ ] macros
    • [ ] framework functions
    • [ ] UDFs?
  • [ ] Threading
  • [ ] Call frames
  • [ ] Script scanner
  • [ ] Global object storage
  • [ ] Plugins
  • [ ] Test on Linux
  • [ ] Test on Windows
  • [ ] Test on MacOS
• [ ] Write Platform-specific tests
  • [ ] GUI
  • [ ] P/Invoke
  • [ ] COM
  • [ ] Linux tests
  • [ ] Windows tests
  • [ ] MacOS tests
• [ ] Write Perfomance tests

[Unknown6656]

fixed appveyor ci with:

• 1b5fe1f6af2d0c353406480247880c8fb89cf6e6
• 7c88dc72bb79cfdb0be5087dc144a7d05d5f4fe6
• 93e05f5d386a5d13dbf3e4df3387cc816c0c7156
• fc93768f4fb9ffa967d6ed5dac565bc70f649f24
• 95d3204dacbe3ec3448368c8fcef4885fd80120a
• 8a14e443ea780aae0998a5504aed733eedb6fed1
• 4592ebd76d900b230aa227fa0ec2233d46cf86f2
• b45f28a975dc66fd8e2685e43bb564be8839c799
• e73fb212c03224c0c8f3c7daaea462c6b4a268bf
• c5c0ae9b2ca725666798c8849ecef7de50580e0b