Update dependencies (#333)

vendor/github.com/jackc/pgconn/pgconn.go

@@ -578,7 +578,6 @@ func (pgConn *PgConn) Close(ctx context.Context) error {
 	//
 	// See https://github.com/jackc/pgx/issues/637
 	pgConn.conn.Write([]byte{'X', 0, 0, 0, 4})
-	pgConn.conn.Read(make([]byte, 1))
 
 	return pgConn.conn.Close()
 }
@@ -605,7 +604,6 @@ func (pgConn *PgConn) asyncClose() {
 		pgConn.conn.SetDeadline(deadline)
 
 		pgConn.conn.Write([]byte{'X', 0, 0, 0, 4})
-		pgConn.conn.Read(make([]byte, 1))
 	}()
 }
 
@@ -1187,27 +1185,6 @@ func (pgConn *PgConn) CopyFrom(ctx context.Context, r io.Reader, sql string) (Co
 		return nil, &writeError{err: err, safeToRetry: n == 0}
 	}
 
-	// Read until copy in response or error.
-	var commandTag CommandTag
-	var pgErr error
-	pendingCopyInResponse := true
-	for pendingCopyInResponse {
-		msg, err := pgConn.receiveMessage()
-		if err != nil {
-			pgConn.asyncClose()
-			return nil, preferContextOverNetTimeoutError(ctx, err)
-		}
-
-		switch msg := msg.(type) {
-		case *pgproto3.CopyInResponse:
-			pendingCopyInResponse = false
-		case *pgproto3.ErrorResponse:
-			pgErr = ErrorResponseToPgError(msg)
-		case *pgproto3.ReadyForQuery:
-			return commandTag, pgErr
-		}
-	}
-
 	// Send copy data
 	abortCopyChan := make(chan struct{})
 	copyErrChan := make(chan error, 1)
@@ -1246,6 +1223,7 @@ func (pgConn *PgConn) CopyFrom(ctx context.Context, r io.Reader, sql string) (Co
 		}
 	}()
 
+	var pgErr error
 	var copyErr error
 	for copyErr == nil && pgErr == nil {
 		select {
@@ -1282,6 +1260,7 @@ func (pgConn *PgConn) CopyFrom(ctx context.Context, r io.Reader, sql string) (Co
 	}
 
 	// Read results
+	var commandTag CommandTag
 	for {
 		msg, err := pgConn.receiveMessage()
 		if err != nil {