setting version to 1.26.0
Merge pull request #379 from blairconrad/set-version-to-1.26.0

set version to 1.26.0 for next release
#365, #371 Added OnFakeConfiguration() to fake options and delegated Strict() and CallsBaseMethods() to it, so that they affect also virtual calls during the constructor
#371 Also moved handling of Wrapping() fake option into FakeManagerProvider