mod: trying to fix AppleClang 14 error

````
error: sorry, non-type template argument of type 'float' is not yet supported
    static_limiter<float, .0001f, .1f> time_step              = .01f;
````

lib/include/irritator/helpers.hpp

@@ -5,6 +5,7 @@
 #ifndef ORG_VLEPROJECT_IRRITATOR_HELPERS_2023
 #define ORG_VLEPROJECT_IRRITATOR_HELPERS_2023
 
+#include <concepts>
 #include <irritator/core.hpp>
 #include <irritator/error.hpp>
 
@@ -31,9 +32,9 @@ struct limiter {
 };
 
 template<typename T, T Lower, T Upper>
+    requires std::integral<T>
 class static_limiter
 {
-    static_assert(std::is_arithmetic_v<T>);
     static_assert(Lower < Upper);
 
     T m_value;
@@ -58,6 +59,38 @@ class static_limiter
     operator T() const noexcept { return m_value; }
 };
 
+template<typename T, int LowerNum, int LowerDenom, int UpperNum, int UpperDenom>
+    requires std::floating_point<T>
+class floating_point_limiter
+{
+    static inline constexpr T lower =
+      static_cast<T>(LowerNum) / static_cast<T>(LowerDenom);
+    static inline constexpr T upper =
+      static_cast<T>(UpperNum) / static_cast<T>(UpperDenom);
+    static_assert(lower < upper);
+
+    T m_value;
+
+public:
+    constexpr floating_point_limiter(const T value) noexcept
+      : m_value(std::clamp(value, lower, upper))
+    {}
+
+    static constexpr bool is_valid(const T value) noexcept
+    {
+        return lower <= value && value <= upper;
+    }
+
+    void set(const T value) noexcept
+    {
+        m_value = std::clamp(value, lower, upper);
+    }
+
+    T value() const noexcept { return m_value; }
+    operator T() noexcept { return m_value; }
+    operator T() const noexcept { return m_value; }
+};
+
 template<typename>
 struct is_result : std::false_type {};
 

lib/include/irritator/modeling.hpp

@@ -705,9 +705,9 @@ class variable_simulation_observer
 
     vector<observer_id> observers;
 
-    static_limiter<i32, 8, 512>        raw_buffer_size        = 64;
-    static_limiter<i32, 1024, 65536>   linearized_buffer_size = 32768;
-    static_limiter<float, .0001f, .1f> time_step              = .01f;
+    static_limiter<i32, 8, 512>      raw_buffer_size         = 64;
+    static_limiter<i32, 1024, 65536> linearized_buffer_size  = 32768;
+    floating_point_limiter<float, 1, 10000, 1, 10> time_step = .01f;
 
     variable_observer_id id = undefined<variable_observer_id>();
 };