Add signatures for unique

Author: kgryte

signatures/sets/unique.md

@@ -0,0 +1,43 @@
+# unique
+
+## NumPy
+
+```
+numpy.unique(ar, return_index=False, return_inverse=False, return_counts=False, axis=None) → ndarray | tuple[ ndarray, ... ]
+```
+
+## CuPy
+
+```
+cupy.unique(ar, return_index=False, return_inverse=False, return_counts=False, axis=None) → ndarray | tuple[ ndarray, ... ]
+```
+
+## dask.array
+
+```
+dask.array.unique(ar, return_index=False, return_inverse=False, return_counts=False) → ndarray | tuple[ ndarray, ... ]
+```
+
+## JAX
+
+```
+jax.numpy.unique(ar, return_index=False, return_inverse=False, return_counts=False, axis=None) → ndarray | tuple[ ndarray, ... ]
+```
+
+## MXNet
+
+```
+np.unique(ar, return_index=False, return_inverse=False, return_counts=False, axis=None) → ndarray | tuple[ ndarray, ... ]
+```
+
+## PyTorch
+
+```
+torch.unique(input, sorted=False, return_inverse=False, return_counts=False, dim=None) → Tensor | tuple[ Tensor, ... ]
+```
+
+## TensorFlow
+
+```
+tf.unique(x, out_idx=tf.dtypes.int32, name=None) → tuple[ Tensor, ... ]
+```