Path alias tests folder

- Set path alias `_tests/*` to folder `tests/` in `tsconfig`.

Author: iamWing

tsconfig.json

@@ -9,7 +9,8 @@
       "_main/*": ["src/main/*"],
       "_models/*": ["src/models/*"],
       "_renderer/*": ["src/renderer/*"],
-      "_utils/*": ["src/utils/*"]
+      "_utils/*": ["src/utils/*"],
+      "_tests/*": ["tests/*"]
     },
     "module": "commonjs",
     "moduleResolution": "node",