fix: fallback to the other pyls if one doesn't exist

Author: aminya

lib/main.js

@@ -50,7 +50,8 @@ class PythonLanguageClient extends AutoLanguageClient {
       let pyls = atom.config.get("ide-python.pyls") || "pylsp"
       // check if it exists
       if (whichSync(pyls, { nothrow: true }) === null) {
-        pyls = "pyls"
+        // use the other one if it doesn't exist
+        pyls = pyls === "pylsp" ? "pyls" : "pylsp"
       }
       // cache
       this.pyls = pyls