Enable checks for pointer arithmetic

Quite a few places we've disobeyed this rule, so simply ignore them for
now to avoid new issues popping up.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I3e518a8e8742279afb3ad1a9dad54006ed109fb1
diff --git a/include/json_html_serializer.hpp b/include/json_html_serializer.hpp
index 3efc224..4969d27 100644
--- a/include/json_html_serializer.hpp
+++ b/include/json_html_serializer.hpp
@@ -353,6 +353,7 @@
 
     // jump to the end to generate the string from backward
     // so we later avoid reversing the result
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
     bufferPtr += nChars;
 
     // Fast int2ascii implementation inspired by "Fastware" talk by Andrei
@@ -384,6 +385,8 @@
 {
     std::array<char, 64> numberbuffer{{}};
     char* begin = numberbuffer.data();
+
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
     ::nlohmann::detail::to_chars(begin, begin + numberbuffer.size(), number);
 
     out += begin;