v2.2.7

• no more use of 'st' + 'ream' #267 by @calvinmetcalf
• improved READABLE_STREAM=disable flag #269 by @mcollina
• depend on buffer-shims using caret for better compatibility with older npm #268 by @mcollina
• bumped string_decoder to v1.0.0 #274 by @mcollina