Fix PowerShell hang when checking dll version (#29)

Fixes #27

When the dll version check hung, `LSP-PowerShellEditorServices` could not determine 
the version and tried to download and install `PowerShellEditorServices` again.

As a side effect, LSP server startup is faster.

plugin.py

@@ -34,7 +34,7 @@ def needs_update_or_installation(cls) -> bool:
                 # Install only, if powershell is available!
                 return False
             cmd = '[System.Diagnostics.FileVersionInfo]::GetVersionInfo("{}").FileVersion'.format(cls.dll_path())
-            version_info = cls.run(powershell_exe, "-Command", cmd).decode('ascii')
+            version_info = cls.run(powershell_exe, "-NoLogo", "-NoProfile", "-Command", cmd).decode('ascii')
             version_info = ".".join(version_info.splitlines()[0].strip().split('.')[0:3])
             return cls.version_str() != version_info
         except Exception: