Make fp versions of set and setWith immutable.

lib/fp/mapping.js

@@ -85,15 +85,15 @@ module.exports = {
       'invokeMap,isMatch,lastIndexOf,map,mapKeys,mapValues,matchesProperty,maxBy,' +
       'mean,minBy,merge,omit,overArgs,pad,padLeft,padRight,parseInt,partition,' +
       'pick,pull,pullAll,pullAt,random,range,rangeRight,rearg,reject,remove,repeat,' +
-      'result,sampleSize,set,some,sortBy,sortByOrder,sortedIndexBy,sortedLastIndexBy,' +
+      'result,sampleSize,some,sortBy,sortByOrder,sortedIndexBy,sortedLastIndexBy,' +
       'sortedUniqBy,startsWith,subtract,sumBy,take,takeRight,takeRightWhile,takeWhile,' +
       'throttle,times,truncate,union,uniqBy,without,wrap,xor,zip,zipObject').split(','),
     3: (
       'assignWith,clamp,differenceBy,extendWith,getOr,inRange,intersectionBy,' +
       'isEqualWith,isMatchWith,mergeWith,omitBy,pickBy,pullAllBy,reduce,' +
-      'reduceRight,slice,transform,unionBy,xorBy,zipWith').split(','),
+      'reduceRight,set,slice,transform,unionBy,xorBy,zipWith').split(','),
     4:
-      ['fill']
+      ['fill', 'setWith']
   },
 
   /** Used to map ary to rearg configs by method ary. */
@@ -108,6 +108,7 @@ module.exports = {
     'clamp': [2, 0, 1],
     'reduce': [2, 0, 1],
     'reduceRight': [2, 0, 1],
+    'setWith': [3, 2, 1, 0],
     'slice': [2, 0, 1],
     'transform': [2, 0, 1]
   },
@@ -142,6 +143,10 @@ module.exports = {
       'extendWith': true,
       'merge': true,
       'mergeWith': true
+    },
+    'set': {
+      'set': true,
+      'setWith': true
     }
   },