Fix typo

Author: gonzalocasas

src/compas/rpc/proxy.py

@@ -229,7 +229,7 @@ def start_server(self):
             Popen
         except NameError:
             self._process = Process()
-            self._process.StartInfo.EvironmentVariables = env
+            self._process.StartInfo.EnvironmentVariables = env
             self._process.StartInfo.UseShellExecute = False
             self._process.StartInfo.RedirectStandardOutput = True
             self._process.StartInfo.RedirectStandardError = True