Add missing includes for better Bazel compatibility (#1255)

Bazel has a "strict" build model that requires all C++ header files be compilable on their own, and thus must explicitly #include all headers they require (even if de facto header inclusion order means they'd get them "for free"). This adds a couple of headers that are needed (but missing) by this model.

include/pybind11/detail/class.h

@@ -10,6 +10,7 @@
 #pragma once
 #pragma once
 
 
 #include "../attr.h"
 #include "../attr.h"
+#include "../options.h"
 
 
 NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 NAMESPACE_BEGIN(detail)
 NAMESPACE_BEGIN(detail)

include/pybind11/detail/typeid.h

@@ -16,6 +16,8 @@
 #include <cxxabi.h>
 #include <cxxabi.h>
 #endif
 #endif
 
 
+#include "common.h"
+
 NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 NAMESPACE_BEGIN(detail)
 NAMESPACE_BEGIN(detail)
 /// Erase all occurrences of a substring
 /// Erase all occurrences of a substring