Update README notice about node.js compatibility (#327)

Author: awerlang

README.md

@@ -29,7 +29,7 @@ instance methods, and class methods that are supported.
 - Super fast. Backed by Typed Arrays (`Uint8Array`/`ArrayBuffer`, not `Object`)
 - Extremely small bundle size (**6.75KB minified + gzipped**, 51.9KB with comments)
 - Excellent browser support (Chrome, Firefox, Edge, Safari 11+, iOS 11+, Android, etc.)
-- Preserves Node API exactly, with one minor difference (see below)
+- Preserves Node API exactly
 - Square-bracket `buf[4]` notation works!
 - Does not modify any browser prototypes or put anything on `window`
 - Comprehensive test suite (including all buffer tests from node.js core)