Work around Nimble/Carthage Issue

Author: Ben-G

.DS_Store

@@ -1,2 +1,6 @@
 github "Quick/Quick"
-github "Quick/Nimble"
+
+# Release 7.0.1 produces a build error due to using a `swift-version` argument
+# See: https://github.com/Quick/Nimble/issues/434
+# As of now fix has not been released yet.
+github "Quick/Nimble"  == 7.0.0

Cartfile.private

@@ -1,3 +1,3 @@
-github "Quick/Nimble" "v7.0.1"
+github "Quick/Nimble" "v7.0.0"
 github "Quick/Quick" "v1.1.0"
 github "ReSwift/ReSwift" "4.0.0"