Doc-deprecate

Ref Level/community#113

README.md

@@ -1,6 +1,8 @@
 # encoding-down
 
-> An [`abstract-leveldown`][abstract-leveldown] implementation that wraps another store to encode keys and values.
+**An [`abstract-leveldown`][abstract-leveldown] implementation that wraps another store to encode keys and values.**
+
+> :pushpin: This module will soon be [deprecated](https://github.com/Level/community/issues/113), because its functionality is included in [`abstract-level`](https://github.com/Level/abstract-level).
 
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