fix: define PYBIND11_CPP14 for recent intel compilers

Author: tobiasleibner

include/pybind11/detail/common.h

@@ -27,7 +27,7 @@
 #  endif
 #endif
 
-#if !(defined(_MSC_VER) && __cplusplus == 199711L) && !defined(__INTEL_COMPILER)
+#if !(defined(_MSC_VER) && __cplusplus == 199711L) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1900)
 #  if __cplusplus >= 201402L
 #    define PYBIND11_CPP14
 #    if __cplusplus >= 201703L