Merge #124: Remove mention of arrayvec from readme

e8ae63e Remove mention of arrayvec from readme (Tobin C. Harding)

Pull request description:

  We no longer have an arrayvec feature, remove the mention of it from the readme.

ACKs for top commit:
  apoelstra:
    ACK e8ae63e

Tree-SHA512: 2749886c27fce40336edc4d5f209c75bc01678d4d3f679eeb6b0c97d23422c0f97910d12bd86f9cbdc1c606deb9d4a52824904022a8e0a7ff9242781d914adc7

Author: apoelstra

README.md

@@ -14,7 +14,7 @@ Bitcoin-specific address encoding is handled by the `bitcoin-bech32` crate.
 
 ## MSRV
 
-This library should always compile with any combination of features excluding "arrayvec" on **Rust 1.48.0**.
+This library should always compile with any combination of features on **Rust 1.48.0**.
 
 
 ## Githooks