Merge pull request #24 from saxbophone/josh/out-of-source-build

Enable out-of-source builds

Author: saxbophone

CMakeLists.txt

@@ -122,7 +122,7 @@ enable_testing()
 include(CTest)
 include(Catch)
 
-catch_discover_tests(unit_tests)
+catch_discover_tests(unit_tests WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}/tests")
 
 install(
     TARGETS dengr