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diff --git a/deps/sol2/include/sol/string_view.hpp b/deps/sol2/include/sol/string_view.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_STRING_VIEW_HPP
+#define SOL_STRING_VIEW_HPP
+
+#include "feature_test.hpp"
+#include <cstddef>
+#include <string>
+#if defined(SOL_CXX17_FEATURES) && SOL_CXX17_FEATURES
+#include <string_view>
+#endif // C++17 features
+#include <functional>
+#if defined(SOL_USE_BOOST) && SOL_USE_BOOST
+#include <boost/functional/hash.hpp>
+#endif
+
+namespace sol {
+#if defined(SOL_CXX17_FEATURES) && SOL_CXX17_FEATURES
+	template <typename C, typename T = std::char_traits<C>>
+	using basic_string_view = std::basic_string_view<C, T>;
+	typedef std::string_view string_view;
+	typedef std::wstring_view wstring_view;
+	typedef std::u16string_view u16string_view;
+	typedef std::u32string_view u32string_view;
+	typedef std::hash<std::string_view> string_view_hash;
+#else
+	template <typename Char, typename Traits = std::char_traits<Char>>
+	struct basic_string_view {
+		std::size_t s;
+		const Char* p;
+
+		basic_string_view(const std::string& r)
+		: basic_string_view(r.data(), r.size()) {
+		}
+		constexpr basic_string_view(const Char* ptr) : basic_string_view(ptr, Traits::length(ptr)) {
+		}
+		constexpr basic_string_view(const Char* ptr, std::size_t sz) : s(sz), p(ptr) {
+		}
+
+		static int compare(const Char* lhs_p, std::size_t lhs_sz, const Char* rhs_p, std::size_t rhs_sz) {
+			int result = Traits::compare(lhs_p, rhs_p, lhs_sz < rhs_sz ? lhs_sz : rhs_sz);
+			if (result != 0)
+				return result;
+			if (lhs_sz < rhs_sz)
+				return -1;
+			if (lhs_sz > rhs_sz)
+				return 1;
+			return 0;
+		}
+
+		constexpr const Char* begin() const {
+			return p;
+		}
+
+		constexpr const Char* end() const {
+			return p + s;
+		}
+
+		constexpr const Char* cbegin() const {
+			return p;
+		}
+
+		constexpr const Char* cend() const {
+			return p + s;
+		}
+
+		constexpr const Char* data() const {
+			return p;
+		}
+
+		constexpr std::size_t size() const {
+			return s;
+		}
+
+		constexpr std::size_t length() const {
+			return size();
+		}
+
+		operator std::basic_string<Char, Traits>() const {
+			return std::basic_string<Char, Traits>(data(), size());
+		}
+
+		bool operator==(const basic_string_view& r) const {
+			return compare(p, s, r.data(), r.size()) == 0;
+		}
+
+		bool operator==(const Char* r) const {
+			return compare(r, Traits::length(r), p, s) == 0;
+		}
+
+		bool operator==(const std::basic_string<Char, Traits>& r) const {
+			return compare(r.data(), r.size(), p, s) == 0;
+		}
+
+		bool operator!=(const basic_string_view& r) const {
+			return !(*this == r);
+		}
+
+		bool operator!=(const char* r) const {
+			return !(*this == r);
+		}
+
+		bool operator!=(const std::basic_string<Char, Traits>& r) const {
+			return !(*this == r);
+		}
+	};
+
+	template <typename Ch, typename Tr = std::char_traits<Ch>>
+	struct basic_string_view_hash {
+		typedef basic_string_view<Ch, Tr> argument_type;
+		typedef std::size_t result_type;
+
+		template <typename Al>
+		result_type operator()(const std::basic_string<Ch, Tr, Al>& r) const {
+			return (*this)(argument_type(r.c_str(), r.size()));
+		}
+
+		result_type operator()(const argument_type& r) const {
+#if defined(SOL_USE_BOOST) && SOL_USE_BOOST
+			return boost::hash_range(r.begin(), r.end());
+#else
+			// Modified, from libstdc++
+			// An implementation attempt at Fowler No Voll, 1a.
+			// Supposedly, used in MSVC,
+			// GCC (libstdc++) uses MurmurHash of some sort for 64-bit though...?
+			// But, well. Can't win them all, right?
+			// This should normally only apply when NOT using boost,
+			// so this should almost never be tapped into...
+			std::size_t hash = 0;
+			const unsigned char* cptr = reinterpret_cast<const unsigned char*>(r.data());
+			for (std::size_t sz = r.size(); sz != 0; --sz) {
+				hash ^= static_cast<size_t>(*cptr++);
+				hash *= static_cast<size_t>(1099511628211ULL);
+			}
+			return hash; 
+#endif
+		}
+	};
+} // namespace sol
+
+namespace std {
+	template <typename Ch, typename Tr>
+	struct hash< ::sol::basic_string_view<Ch, Tr> > : ::sol::basic_string_view_hash<Ch, Tr> {};
+} // namespace std
+
+namespace sol {
+	using string_view = basic_string_view<char>;
+	using wstring_view = basic_string_view<wchar_t>;
+	using u16string_view = basic_string_view<char16_t>;
+	using u32string_view = basic_string_view<char32_t>;
+	using string_view_hash = std::hash<string_view>;
+#endif // C++17 Support
+} // namespace sol
+
+#endif // SOL_STRING_VIEW_HPP