scripted-diff: modernize outdated trait patterns - types

The use of e.g. `std::underlying_type_t<T>` replaces the older `typename std::underlying_type<T>::type`.
The `_t` helper alias template (such as `std::underlying_type_t<T>`) introduced in C++14 offers a cleaner and more concise way to extract the type directly.
See https://en.cppreference.com/w/cpp/types/underlying_type for details.

-BEGIN VERIFY SCRIPT-
sed -i -E 's/(typename )?(std::[a-z_]+)(<[^<>]+>)::type\b/\2_t\3/g' $(git grep -l '::type' ./src ':(exclude)src/bench/nanobench.h' ':(exclude)src/leveldb' ':(exclude)src/minisketch' ':(exclude)src/span.h' ':(exclude)src/sync.h')
-END VERIFY SCRIPT-

src/deploymentstatus.cpp

@@ -24,7 +24,7 @@ static_assert(!ValidDeployment(static_cast<Consensus::BuriedDeployment>(Consensu
 template<typename T, T x>
 static constexpr bool is_minimum()
 {
-    using U = typename std::underlying_type<T>::type;
+    using U = std::underlying_type_t<T>;
     return x == std::numeric_limits<U>::min();
 }