PR Checklist:

• I have tested this extensively and it does not break any existing behavior.
• I have added/updated examples and tests for any new behavior.

PR Description

The set font wasn't used for rendering the label of the limit line of the x-axis, only for the y-axis.
This PR fixes that issue.
Without this fix, one has to override XAxisRenderer:

public class TypefaceAwareXAxisRenderer extends XAxisRenderer {

    public TypefaceAwareXAxisRenderer(ViewPortHandler viewPortHandler, XAxis xAxis, Transformer trans) {
        super(viewPortHandler, xAxis, trans);
    }

    @Override
    public void renderLimitLineLabel(Canvas c, LimitLine limitLine, float[] position, float yOffset) {
        if (limitLine != null) {
            mLimitLinePaint.setTypeface(limitLine.getTypeface());
        }
        super.renderLimitLineLabel(c, limitLine, position, yOffset);
    }
}