Merge pull request #2072 from mcognetta/export_embedding

Export `Embedding`

Author: ToucheSir

src/Flux.jl

@@ -16,7 +16,7 @@ export gradient
 # Pirate error to catch a common mistake. (Internal function `base` because overloading `update!` is more likely to give ambiguities.)
 Optimisers.base(dx::Zygote.Grads) = error("Optimisers.jl cannot be used with Zygote.jl's implicit gradients, `Params` & `Grads`")
 
-export Chain, Dense, Maxout, SkipConnection, Parallel, PairwiseFusion,
+export Chain, Dense, Embedding, Maxout, SkipConnection, Parallel, PairwiseFusion,
        RNN, LSTM, GRU, GRUv3,
        SamePad, Conv, CrossCor, ConvTranspose, DepthwiseConv,
        AdaptiveMaxPool, AdaptiveMeanPool, GlobalMaxPool, GlobalMeanPool, MaxPool, MeanPool,