move-only: Move UniValue::getInt definition to keep class with definitions only

Can be reviewed with the git options

--color-moved=dimmed-zebra --color-moved-ws=ignore-all-space

Author: MacroFake

src/univalue/include/univalue.h

@@ -116,19 +116,7 @@ class UniValue {
     const std::vector<std::string>& getKeys() const;
     const std::vector<UniValue>& getValues() const;
     template <typename Int>
-    auto getInt() const
-    {
-        static_assert(std::is_integral<Int>::value);
-        if (typ != VNUM) {
-            throw std::runtime_error("JSON value is not an integer as expected");
-        }
-        Int result;
-        const auto [first_nonmatching, error_condition] = std::from_chars(val.data(), val.data() + val.size(), result);
-        if (first_nonmatching != val.data() + val.size() || error_condition != std::errc{}) {
-            throw std::runtime_error("JSON integer out of range");
-        }
-        return result;
-    }
+    Int getInt() const;
     bool get_bool() const;
     const std::string& get_str() const;
     double get_real() const;
@@ -146,6 +134,21 @@ void UniValue::push_backV(It first, It last)
     values.insert(values.end(), first, last);
 }
 
+template <typename Int>
+Int UniValue::getInt() const
+{
+    static_assert(std::is_integral<Int>::value);
+    if (typ != VNUM) {
+        throw std::runtime_error("JSON value is not an integer as expected");
+    }
+    Int result;
+    const auto [first_nonmatching, error_condition] = std::from_chars(val.data(), val.data() + val.size(), result);
+    if (first_nonmatching != val.data() + val.size() || error_condition != std::errc{}) {
+        throw std::runtime_error("JSON integer out of range");
+    }
+    return result;
+}
+
 enum jtokentype {
     JTOK_ERR        = -1,
     JTOK_NONE       = 0,                           // eof