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diff --git a/deps/sol2/include/sol/error_handler.hpp b/deps/sol2/include/sol/error_handler.hpp
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+++ b/deps/sol2/include/sol/error_handler.hpp
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+// sol3 
+
+// The MIT License (MIT)
+
+// Copyright (c) 2013-2019 Rapptz, ThePhD and contributors
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef SOL_ERROR_HANDLER_HPP
+#define SOL_ERROR_HANDLER_HPP
+
+#include "types.hpp"
+#include "demangle.hpp"
+
+namespace sol {
+
+	namespace detail {
+		constexpr const char* not_a_number = "not a numeric type";
+		constexpr const char* not_a_number_or_number_string = "not a numeric type or numeric string";
+		constexpr const char* not_a_number_integral = "not a numeric type that fits exactly an integer (has significant decimals)";
+		constexpr const char* not_a_number_or_number_string_integral
+		     = "not a numeric type or a numeric string that fits exactly an integer (has significant decimals)";
+
+		constexpr const char* not_enough_stack_space = "not enough space left on Lua stack";
+		constexpr const char* not_enough_stack_space_floating = "not enough space left on Lua stack for a floating point number";
+		constexpr const char* not_enough_stack_space_integral = "not enough space left on Lua stack for an integral number";
+		constexpr const char* not_enough_stack_space_string = "not enough space left on Lua stack for a string";
+		constexpr const char* not_enough_stack_space_meta_function_name = "not enough space left on Lua stack for the name of a meta_function";
+		constexpr const char* not_enough_stack_space_userdata = "not enough space left on Lua stack to create a sol3 userdata";
+		constexpr const char* not_enough_stack_space_generic = "not enough space left on Lua stack to push valuees";
+		constexpr const char* not_enough_stack_space_environment = "not enough space left on Lua stack to retrieve environment";
+		constexpr const char* protected_function_error = "caught (...) unknown error during protected_function call";
+
+		inline void accumulate_and_mark(const std::string& n, std::string& addendum, int& marker) {
+			if (marker > 0) {
+				addendum += ", ";
+			}
+			addendum += n;
+			++marker;
+		}
+	}
+
+	inline std::string associated_type_name(lua_State* L, int index, type t) {
+		switch (t) {
+		case type::poly:
+			return "anything";
+		case type::userdata:
+		{
+#if defined(SOL_SAFE_STACK_CHECK) && SOL_SAFE_STACK_CHECK
+			luaL_checkstack(L, 2, "not enough space to push get the type name");
+#endif // make sure stack doesn't overflow
+			if (lua_getmetatable(L, index) == 0) {
+				break;
+			}
+			lua_pushlstring(L, "__name", 6);
+			lua_rawget(L, -2);
+			size_t sz;
+			const char* name = lua_tolstring(L, -1, &sz);
+			std::string tn(name, static_cast<std::string::size_type>(sz));
+			lua_pop(L, 2);
+			return tn;
+		}
+		default:
+			break;
+		}
+		return lua_typename(L, static_cast<int>(t));
+	}
+
+	inline int type_panic_string(lua_State* L, int index, type expected, type actual, const std::string& message = "") noexcept(false) {
+		const char* err = message.empty() ? "stack index %d, expected %s, received %s" : "stack index %d, expected %s, received %s: %s";
+		std::string actualname = associated_type_name(L, index, actual);
+		return luaL_error(L, err, index,
+			expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(expected)),
+			actualname.c_str(),
+			message.c_str());
+	}
+
+	inline int type_panic_c_str(lua_State* L, int index, type expected, type actual, const char* message = nullptr) noexcept(false) {
+		const char* err = message == nullptr || (std::char_traits<char>::length(message) == 0) ? "stack index %d, expected %s, received %s" : "stack index %d, expected %s, received %s: %s";
+		std::string actualname = associated_type_name(L, index, actual);
+		return luaL_error(L, err, index,
+			expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(expected)),
+			actualname.c_str(),
+			message);
+	}
+
+	struct type_panic_t {
+		int operator()(lua_State* L, int index, type expected, type actual) const noexcept(false) {
+			return type_panic_c_str(L, index, expected, actual, nullptr);
+		}
+		int operator()(lua_State* L, int index, type expected, type actual, const char* message) const noexcept(false) {
+			return type_panic_c_str(L, index, expected, actual, message);
+		}
+		int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
+			return type_panic_string(L, index, expected, actual, message);
+		}
+	};
+
+	const type_panic_t type_panic = {};
+
+	struct constructor_handler {
+		int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
+			std::string str = "(type check failed in constructor)";
+			return type_panic_string(L, index, expected, actual, message.empty() ? str : message + " " + str);
+		}
+	};
+
+	template <typename F = void>
+	struct argument_handler {
+		int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
+			std::string str = "(bad argument to variable or function call)";
+			return type_panic_string(L, index, expected, actual, message.empty() ? str : message + " " + str );
+		}
+	};
+
+	template <typename R, typename... Args>
+	struct argument_handler<types<R, Args...>> {
+		int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
+			std::string addendum = "(bad argument into '";
+			addendum += detail::demangle<R>();
+			addendum += "(";
+			int marker = 0;
+			(void)detail::swallow{int(), (detail::accumulate_and_mark(detail::demangle<Args>(), addendum, marker), int())...};
+			addendum += ")')";
+			return type_panic_string(L, index, expected, actual, message.empty() ? addendum : message + " " + addendum);
+		}
+	};
+
+	// Specify this function as the handler for lua::check if you know there's nothing wrong
+	inline int no_panic(lua_State*, int, type, type, const char* = nullptr) noexcept {
+		return 0;
+	}
+
+	inline void type_error(lua_State* L, int expected, int actual) noexcept(false) {
+		luaL_error(L, "expected %s, received %s", lua_typename(L, expected), lua_typename(L, actual));
+	}
+
+	inline void type_error(lua_State* L, type expected, type actual) noexcept(false) {
+		type_error(L, static_cast<int>(expected), static_cast<int>(actual));
+	}
+
+	inline void type_assert(lua_State* L, int index, type expected, type actual) noexcept(false) {
+		if (expected != type::poly && expected != actual) {
+			type_panic_c_str(L, index, expected, actual, nullptr);
+		}
+	}
+
+	inline void type_assert(lua_State* L, int index, type expected) {
+		type actual = type_of(L, index);
+		type_assert(L, index, expected, actual);
+	}
+
+} // namespace sol
+
+#endif // SOL_ERROR_HANDLER_HPP