Build with Go 1.20 and update misc dependencies

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/golang.org/x/net/http2/server.go

@@ -1822,15 +1822,18 @@ func (sc *serverConn) processData(f *DataFrame) error {
 		}
 
 		if len(data) > 0 {
+			st.bodyBytes += int64(len(data))
 			wrote, err := st.body.Write(data)
 			if err != nil {
+				// The handler has closed the request body.
+				// Return the connection-level flow control for the discarded data,
+				// but not the stream-level flow control.
 				sc.sendWindowUpdate(nil, int(f.Length)-wrote)
-				return sc.countError("body_write_err", streamError(id, ErrCodeStreamClosed))
+				return nil
 			}
 			if wrote != len(data) {
 				panic("internal error: bad Writer")
 			}
-			st.bodyBytes += int64(len(data))
 		}
 
 		// Return any padded flow control now, since we won't