CMake: Fix error locating Boost without Hunter

When Boost is provided by the build system, it may use a CMake Find module
instead of a package configuration file.

Error was:

| CMake Error at cmake/dependencies.cmake:7 (find_package):
|   Could not find a package configuration file provided by "Boost" with any of
|   the following names:
|
|     BoostConfig.cmake
|     boost-config.cmake

Author: eigendude

cmake/dependencies.cmake

@@ -5,7 +5,7 @@ find_package(GMock CONFIG REQUIRED)
 
 # https://docs.hunter.sh/en/latest/packages/pkg/Boost.html
 hunter_add_package(Boost COMPONENTS random filesystem program_options)
-find_package(Boost CONFIG REQUIRED  random filesystem program_options)
+find_package(Boost REQUIRED random filesystem program_options)
 
 # added from hunter_config
 hunter_add_package(GSL)