1.4.0

• Add charset to the Content-Type header
• Support statusCode property on Error objects
• deps: accepts@~1.2.9
  • deps: mime-types@~2.1.1
  • deps: negotiator@0.5.3
  • perf: avoid argument reassignment & argument slice
  • perf: avoid negotiator recursive construction
  • perf: enable strict mode
  • perf: remove unnecessary bitwise operator
• deps: escape-html@1.0.2