Update c3.js and c3.min.js

c3.js

@@ -8224,7 +8224,14 @@
             return start < stop ? [ start, stop ] : [ stop, start ];
         }
         function shouldDrawTickText(id){
-            if(!$$.config.axis_rotated) return true;
+            var heightLimits = [
+                // Left is width, right is number of tick labels to be removed
+                [-Infinity],
+                [150, 10],
+                [200, 5],
+                [270, 2],
+                [Infinity, 1]
+            ];
             var widthLimits = [
                 // Left is width, right is number of tick labels to be removed
                 [-Infinity],
@@ -8234,9 +8241,11 @@
                 [Infinity, 1]
             ];
             var divisor;
-            for(var i = widthLimits.length-1; i--; ){
-                if($$.currentWidth > widthLimits[i][0]) {
-                    divisor = widthLimits[i+1][1];
+            var size = $$.config.axis_rotated ? $$.currentWidth : $$.currentHeight;
+            var sizeLimits = $$.config.axis_rotated ? widthLimits : heightLimits;
+            for(var i = sizeLimits.length-1; i--; ){
+                if(size > sizeLimits[i][0]) {
+                    divisor = sizeLimits[i+1][1];
                     break;
                 }
             }
@@ -8378,11 +8387,10 @@
 
                 text = tick.select("text");
                 
-                if($$.config.axis_rotated && orient === 'bottom') {
-                    text.style('display', function(d, i){
-                        return shouldDrawTickText(i) ? 'block' : 'none';
-                    });
-                }
+
+                text.style('display', function(d, i){
+                    return shouldDrawTickText(i) ? 'block' : 'none';
+                });
                 
                 tspan = text.selectAll('tspan')
                     .data(function (d, i) {