v1.6.0

• 4489df8 Update "TechEmpower Benchmark" from round 12 to round 18 (#683) (Andy Pan)
• 9f11af2 Make several optimizations to worker pool (#680) (Andy Pan)
• f82a646 Requests with incomplete bodies no longer cause log noise (#682) (Kevin Burns)
• 9bc6da1 fix: when multipartform no data,FormValue do not panic (#677) (alexDango)
• 707b1c1 Format errors (#679) (ZhangYunHao)
• 18c619f fasthttputil: add errInmemoryListenerClosed (#678) (ZhangYunHao)
• bf98e3b Use least total connections instead of round robin for lbclient (#673) (Erik Dubbelboer)
• ec2e396 Don't run TestClientNilResp in parallel (Erik Dubbelboer)
• d428e1b Fix race condition in tests, fix URI bug (Erik Dubbelboer)
• c3d82ca Speed up testing by running tests in parallel (Erik Dubbelboer)
• 352ec7c Use Fatal instead of Fatalf when no formatting used (Erik Dubbelboer)
• 9dbe5fc Don't allow spaces in request header keys (Erik Dubbelboer)
• 4ebe993 Document PipeConns not being safe for concurrent use (Erik Dubbelboer)
• 044d35e fix 664 (#674) (rogercarter1)
• ffcdb75 Allow client to disable path normalization (#672) (Ian Leue)
• af531ad Move comment to now show up on godoc (Erik Dubbelboer)
• 28af1f1 Fix previous commit (Erik Dubbelboer)
• 5038ebc Refactoring to reuse response status codes (#666) (Vendin)
• b1ca43f Use 'go generate' in bytesconv.go (#663) (ZhangYunHao)
• 97d51fb go fmt ./... (Erik Dubbelboer)
• e6a8bcf Add go version to go.mod, test with 1.13.1 (Erik Dubbelboer)
• 1d6a7e0 The Authorization header should include the Basic keyword (Erik Dubbelboer)
• dc9b54d Precompute default regexp (#662) (Oleg Kovalov)
• be93fbd Add lowerhex (ZYunH)
• 79bd450 Use 0xf instead of 15 (ZYunH)
• 91138ee Replace int2hexbyte with uppercase (ZYunH)
• 9bc19f8 Replace hexCharUpeer with upperhex (#657) (ZYunH)
• d644da4 Update README.md (Kirill Danshin)
• ae42116 Improve appendQuotedPath and AppendQuotedArg (#654) (ZYunH)
• ee84500 Added option to disable path normalization (#649) (Daniel Firsht)
• c6037ab Update fuzzit (Erik Dubbelboer)