build(deps): bump github.com/labstack/echo/v4 from 4.7.2 to 4.8.0

Bumps [github.com/labstack/echo/v4](https://github.com/labstack/echo) from 4.7.2 to 4.8.0.
- [Release notes](https://github.com/labstack/echo/releases)
- [Changelog](https://github.com/labstack/echo/blob/master/CHANGELOG.md)
- [Commits](https://github.com/labstack/echo/compare/v4.7.2...v4.8.0)

---
updated-dependencies:
- dependency-name: github.com/labstack/echo/v4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

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

@@ -183,6 +183,8 @@ const (
 	PROPFIND = "PROPFIND"
 	// REPORT Method can be used to get information about a resource, see rfc 3253
 	REPORT = "REPORT"
+	// RouteNotFound is special method type for routes handling "route not found" (404) cases
+	RouteNotFound = "echo_route_not_found"
 )
 
 // Headers
@@ -246,7 +248,7 @@ const (
 
 const (
 	// Version of Echo
-	Version = "4.7.2"
+	Version = "4.8.0"
 	website = "https://echo.labstack.com"
 	// http://patorjk.com/software/taag/#p=display&f=Small%20Slant&t=Echo
 	banner = `
@@ -480,8 +482,21 @@ func (e *Echo) TRACE(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
 	return e.Add(http.MethodTrace, path, h, m...)
 }
 
-// Any registers a new route for all HTTP methods and path with matching handler
+// RouteNotFound registers a special-case route which is executed when no other route is found (i.e. HTTP 404 cases)
+// for current request URL.
+// Path supports static and named/any parameters just like other http method is defined. Generally path is ended with
+// wildcard/match-any character (`/*`, `/download/*` etc).
+//
+// Example: `e.RouteNotFound("/*", func(c echo.Context) error { return c.NoContent(http.StatusNotFound) })`
+func (e *Echo) RouteNotFound(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return e.Add(RouteNotFound, path, h, m...)
+}
+
+// Any registers a new route for all HTTP methods (supported by Echo) and path with matching handler
 // in the router with optional route-level middleware.
+//
+// Note: this method only adds specific set of supported HTTP methods as handler and is not true
+// "catch-any-arbitrary-method" way of matching requests.
 func (e *Echo) Any(path string, handler HandlerFunc, middleware ...MiddlewareFunc) []*Route {
 	routes := make([]*Route, len(methods))
 	for i, m := range methods {
@@ -515,6 +530,7 @@ func (e *Echo) File(path, file string, m ...MiddlewareFunc) *Route {
 func (e *Echo) add(host, method, path string, handler HandlerFunc, middleware ...MiddlewareFunc) *Route {
 	name := handlerName(handler)
 	router := e.findRouter(host)
+	// FIXME: when handler+middleware are both nil ... make it behave like handler removal
 	router.Add(method, path, func(c Context) error {
 		h := applyMiddleware(handler, middleware...)
 		return h(c)