Add allEOFVersions to EVMVersion

Author: clonker

liblangutil/EVMVersion.h

@@ -23,6 +23,7 @@
 
 #include <libsolutil/Assertions.h>
 
+#include <array>
 #include <cstdint>
 #include <optional>
 #include <string>
@@ -83,6 +84,14 @@ class EVMVersion
 		};
 	}
 
+	static auto constexpr allEOFVersions()
+	{
+		return std::array{
+			std::optional<uint8_t>(),
+			std::make_optional<uint8_t>(1)
+		};
+	}
+
 	static std::optional<EVMVersion> fromString(std::string const& _version)
 	{
 		for (auto const& v: allVersions())