fix: extend env as a dict

Signed-off-by: Donnie Adams <[email protected]>

Author: thedadams

gptscript/opts.py

@@ -25,7 +25,7 @@ def merge(self, other: Self) -> Self:
         cp.BaseURL = other.BaseURL if other.BaseURL != "" else self.BaseURL
         cp.DefaultModel = other.DefaultModel if other.DefaultModel != "" else self.DefaultModel
         cp.DefaultModelProvider = other.DefaultModelProvider if other.DefaultModelProvider != "" else self.DefaultModelProvider
-        cp.Env = (other.Env or []).extend(self.Env or [])
+        cp.Env = {**(self.Env or {}), **(other.Env or {})}
         return cp
 
     def toEnv(self):