Log Message:
tex-pst-plot{,-doc}: update to 1.90

1.87
This version fixes two bugs with the plotstyle polarplot.

1.85  2017-11-12  - try to prevent overfull hbox for the x axis.
                    used \hbox to 0pt [...\hss}
                  - fix bug with wrong \use at par setting for \psaxes at vii
                  - fix for trailing space in trigLabels
                  - fix for x|yLabels when starting not at the origin