Update vendor (#1461)

* Update vendored libs

* Fix slack api changes

vendor/github.com/labstack/echo/v4/middleware/middleware.go

@@ -2,7 +2,6 @@ package middleware
 
 import (
 	"net/http"
-	"net/url"
 	"regexp"
 	"strconv"
 	"strings"
@@ -49,30 +48,39 @@ func rewriteRulesRegex(rewrite map[string]string) map[*regexp.Regexp]string {
 	return rulesRegex
 }
 
-func rewritePath(rewriteRegex map[*regexp.Regexp]string, req *http.Request) {
-	for k, v := range rewriteRegex {
-		rawPath := req.URL.RawPath
-		if rawPath != "" {
-			// RawPath is only set when there has been escaping done. In that case Path must be deduced from rewritten RawPath
-			// because encoded Path could match rules that RawPath did not
-			if replacer := captureTokens(k, rawPath); replacer != nil {
-				rawPath = replacer.Replace(v)
+func rewriteURL(rewriteRegex map[*regexp.Regexp]string, req *http.Request) error {
+	if len(rewriteRegex) == 0 {
+		return nil
+	}
 
-				req.URL.RawPath = rawPath
-				req.URL.Path, _ = url.PathUnescape(rawPath)
-
-				return // rewrite only once
-			}
-
-			continue
+	// Depending how HTTP request is sent RequestURI could contain Scheme://Host/path or be just /path.
+	// We only want to use path part for rewriting and therefore trim prefix if it exists
+	rawURI := req.RequestURI
+	if rawURI != "" && rawURI[0] != '/' {
+		prefix := ""
+		if req.URL.Scheme != "" {
+			prefix = req.URL.Scheme + "://"
 		}
-
-		if replacer := captureTokens(k, req.URL.Path); replacer != nil {
-			req.URL.Path = replacer.Replace(v)
-
-			return // rewrite only once
+		if req.URL.Host != "" {
+			prefix += req.URL.Host // host or host:port
+		}
+		if prefix != "" {
+			rawURI = strings.TrimPrefix(rawURI, prefix)
 		}
 	}
+
+	for k, v := range rewriteRegex {
+		if replacer := captureTokens(k, rawURI); replacer != nil {
+			url, err := req.URL.Parse(replacer.Replace(v))
+			if err != nil {
+				return err
+			}
+			req.URL = url
+
+			return nil // rewrite only once
+		}
+	}
+	return nil
 }
 
 // DefaultSkipper returns false which processes the middleware.