fix: enable hot reload on windows (#283)

* fix(dev_event_handler.py): use platform specific python3 alias to spawn processes

robyn/dev_event_handler.py

@@ -1,4 +1,5 @@
 import subprocess
+import sys
 
 from watchdog.events import FileSystemEventHandler
 
@@ -7,11 +8,14 @@ class EventHandler(FileSystemEventHandler):
     def __init__(self, file_name) -> None:
         self.file_name = file_name
         self.processes = []
+        self.python_alias = "python3" if not sys.platform.startswith("win32") else "python"
+        self.shell = True if sys.platform.startswith("win32") else False
+
 
     def start_server_first_time(self) -> None:
         if self.processes:
             raise Exception("Something wrong with the server")
-        self.processes.append(subprocess.Popen(["python3", self.file_name], start_new_session=False))
+        self.processes.append(subprocess.Popen([self.python_alias, self.file_name], shell = self.shell, start_new_session=False))
 
     def on_any_event(self, event) -> None:
         """
@@ -22,5 +26,5 @@ def on_any_event(self, event) -> None:
 
         if len(self.processes) > 0:
             for process in self.processes:
-                process.terminate()
-        self.processes.append(subprocess.Popen(["python3", self.file_name], start_new_session=False))
+                process.terminate()         
+        self.processes.append(subprocess.Popen([self.python_alias, self.file_name], shell = self.shell, start_new_session=False))