update to beta.1, maybe fix macos issue

Author: matcool

mod.json

@@ -1,6 +1,6 @@
 {
-	"geode": "4.0.0-alpha.1",
-	"version": "v1.6.5",
+	"geode": "4.0.0-beta.1",
+	"version": "v1.6.6",
 	"gd": {
 		"win": "2.2074",
 		"android": "2.2074",

src/Pack.cpp

@@ -24,8 +24,10 @@ Result<PackInfo> PackInfo::from(matjson::Value const& json) {
     root.needs("version").into(info.m_version);
 
     // has single "author" key?
-    if (auto& author = root.has("author").assertIsString()) {
-        info.m_authors = { author.get<std::string>() };
+    if (auto author = root.has("author")) {
+        std::string temp;
+        author.into(temp);
+        info.m_authors = { temp };
     }
     // otherwise use "authors" key
     else {