Add explicit qualifier to size constructor

This prevent some weird implicit constructions that could occur
chaining implicit conversions

src/utils/Array.hpp

@@ -75,7 +75,7 @@ class [[nodiscard]] Array
   Array& operator=(Array&&) = default;
 
   PUGS_INLINE
-  Array(size_t size) : m_values("anonymous", size)
+  explicit Array(size_t size) : m_values("anonymous", size)
   {
     static_assert(not std::is_const<DataType>(), "Cannot allocate Array of const data: only view is "
                                                  "supported");