v4.1.0

• Built-in capability to run multiple hosts via Echo#Host()
• Fix unhandled errors (#1271)
• Simplify code of Add/Remove trailing slash and fix bug (#1275)
• Use concurrency safe context by default. (#1158)
• Echo.StartTLS: accept string or []byte as parameters. (#1277)
• Support Content-Security-Policy-Report-Only header (#1287)
• Refactor DefaultProxyConfig Skipper & WebSocket Check in Context (#1297)
• Enable adding preload tag to HSTS header (#1247)
• Set subdomains to AllowOrigins with wildcard (#1301)
• Ensure that the TLS config contains the ALPN protocol (#1305)
• Fix flushing in Gzip middleware (#1317)
• Updated dependencies