fixed VS 2017 builds

Author: andreasbuhr

include/cppcoro/detail/sync_wait_task.hpp

@@ -68,7 +68,7 @@ namespace cppcoro
 				return completion_notifier{};
 			}
 
-#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'00'00000
+#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'20'00000
 			// HACK: This is needed to work around a bug in MSVC 2017.7/2017.8.
 			// See comment in make_sync_wait_task below.
 			template<typename Awaitable>
@@ -245,7 +245,7 @@ namespace cppcoro
 
 		};
 
-#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'00'00000
+#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'20'00000
 		// HACK: Work around bug in MSVC where passing a parameter by universal reference
 		// results in an error when passed a move-only type, complaining that the copy-constructor
 		// has been deleted. The parameter should be passed by reference and the compiler should

include/cppcoro/detail/when_all_task.hpp

@@ -76,7 +76,7 @@ namespace cppcoro
 				assert(false);
 			}
 
-#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'00'00000
+#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'20'00000
 			// HACK: This is needed to work around a bug in MSVC 2017.7/2017.8.
 			// See comment in make_when_all_task below.
 			template<typename Awaitable>
@@ -301,7 +301,7 @@ namespace cppcoro
 			std::enable_if_t<!std::is_void_v<RESULT>, int> = 0>
 		when_all_task<RESULT> make_when_all_task(AWAITABLE awaitable)
 		{
-#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'00'00000
+#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'20'00000
 			// HACK: Workaround another bug in MSVC where the expression 'co_yield co_await x' seems
 			// to completely ignore the co_yield an never calls promise.yield_value().
 			// The coroutine seems to be resuming the 'co_await' after the 'co_yield'
@@ -329,7 +329,7 @@ namespace cppcoro
 			std::enable_if_t<!std::is_void_v<RESULT>, int> = 0>
 		when_all_task<RESULT> make_when_all_task(std::reference_wrapper<AWAITABLE> awaitable)
 		{
-#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'00'00000
+#if CPPCORO_COMPILER_MSVC && CPPCORO_COMPILER_MSVC < 19'20'00000
 			// HACK: Workaround another bug in MSVC where the expression 'co_yield co_await x' seems
 			// to completely ignore the co_yield and never calls promise.yield_value().
 			// The coroutine seems to be resuming the 'co_await' after the 'co_yield'