Update travis.yml

Author: nvlahovic

.travis.yml

@@ -23,7 +23,7 @@ script:
 # - xcodebuild test -project ./Graph/Graph.xcodeproj -scheme GraphTests
 # - xcodebuild test -project ./Heap/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./Heap\ Sort/Tests/Tests.xcodeproj -scheme Tests
-# - xcodebuild test -project ./Insertion\ Sort/Tests/Tests.xcodeproj -scheme Tests
+ - xcodebuild test -project ./Insertion\ Sort/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./K-Means/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./Linked\ List/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./Longest\ Common\ Subsequence/Tests/Tests.xcodeproj -scheme Tests
@@ -37,5 +37,5 @@ script:
 # - xcodebuild test -project ./Shell\ Sort/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./Shortest\ Path\ \(Unweighted\)/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./Single-Source\ Shortest\ Paths\ \(Weighted\)/SSSP.xcodeproj -scheme SSSPTests
-# - xcodebuild test -project ./Stack/Tests/Tests.xcodeproj -scheme Tests
+ - xcodebuild test -project ./Stack/Tests/Tests.xcodeproj -scheme Tests
 # - xcodebuild test -project ./Topological\ Sort/Tests/Tests.xcodeproj -scheme Tests