Update dependencies (#5518)

vendor/github.com/klauspost/compress/huff0/README.md

@@ -12,11 +12,11 @@ but it can be used as a secondary step to compressors (like Snappy) that does no
 
 * [Godoc documentation](https://godoc.org/github.com/klauspost/compress/huff0)
 
-THIS PACKAGE IS NOT CONSIDERED STABLE AND API OR ENCODING MAY CHANGE IN THE FUTURE.
-
 ## News
 
- * Mar 2018: First implementation released. Consider this beta software for now.
+This is used as part of the [zstandard](https://github.com/klauspost/compress/tree/master/zstd#zstd) compression and decompression package.
+
+This ensures that most functionality is well tested.
 
 # Usage
 
@@ -75,6 +75,8 @@ which can be given to the decompressor.
 Decompressing is done by calling the [`Decompress1X`](https://godoc.org/github.com/klauspost/compress/huff0#Scratch.Decompress1X) 
 or [`Decompress4X`](https://godoc.org/github.com/klauspost/compress/huff0#Scratch.Decompress4X) function.
 
+For concurrently decompressing content with a fixed table a stateless [`Decoder`](https://godoc.org/github.com/klauspost/compress/huff0#Decoder) can be requested which will remain correct as long as the scratch is unchanged. The capacity of the provided slice indicates the expected output size.
+
 You must provide the output from the compression stage, at exactly the size you got back. If you receive an error back
 your input was likely corrupted. 
 
@@ -84,4 +86,4 @@ There are no integrity checks, so relying on errors from the decompressor does n
 # Contributing
 
 Contributions are always welcome. Be aware that adding public functions will require good justification and breaking 
-changes will likely not be accepted. If in doubt open an issue before writing the PR.
+changes will likely not be accepted. If in doubt open an issue before writing the PR.