More fixes for lodash 4 API changes

Note this change comes from
ciena-blueplanet@5a3e67e. Unfortunately,
do to a move, git does not allow this to be cherry-picked.

Author: Chris Pettitt

lib/position/bk.js

@@ -292,8 +292,9 @@ function findSmallestWidthAlignment(g, xss) {
  * coordinate of the smallest width alignment.
  */
 function alignCoordinates(xss, alignTo) {
-  var alignToMin = _.min(alignTo),
-      alignToMax = _.max(alignTo);
+  var alignToVals = _.values(alignTo),
+      alignToMin = _.min(alignToVals),
+      alignToMax = _.max(alignToVals);
 
   _.forEach(["u", "d"], function(vert) {
     _.forEach(["l", "r"], function(horiz) {
@@ -302,7 +303,8 @@ function alignCoordinates(xss, alignTo) {
           delta;
       if (xs === alignTo) return;
 
-      delta = horiz === "l" ? alignToMin - _.min(xs) : alignToMax - _.max(xs);
+      var xsVals = _.values(xs);
+      delta = horiz === "l" ? alignToMin - _.min(xsVals) : alignToMax - _.max(xsVals);
 
       if (delta) {
         xss[alignment] = _.mapValues(xs, function(x) { return x + delta; });