This helps suppressing the following message during compilation:
```
/builddir/build/BUILD/solidity-0.8.18/libsolutil/Common.h:55:27: error: 'uint8_t' was not declared in this scope
55 | using bytes = std::vector<uint8_t>;
| ^~~~~~~
/builddir/build/BUILD/solidity-0.8.18/libsolutil/Common.h:49:1: note: 'uint8_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
48 | #include <functional>
+++ |+#include <cstdint>
49 | #include <string>
```
Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>