Sync Eloquent collections documentation

Author: paulofreitas

eloquent-collections.md

@@ -51,11 +51,13 @@ All Eloquent collections extend the base [Laravel collection](/docs/{{version}}/
 <div id="collection-method-list" markdown="1">
 
 [all](/docs/{{version}}/collections#method-all)
+[average](/docs/{{version}}/collections#method-average)
 [avg](/docs/{{version}}/collections#method-avg)
 [chunk](/docs/{{version}}/collections#method-chunk)
 [collapse](/docs/{{version}}/collections#method-collapse)
 [combine](/docs/{{version}}/collections#method-combine)
 [contains](/docs/{{version}}/collections#method-contains)
+[containsStrict](/docs/{{version}}/collections#method-containsstrict)
 [count](/docs/{{version}}/collections#method-count)
 [diff](/docs/{{version}}/collections#method-diff)
 [diffKeys](/docs/{{version}}/collections#method-diffkeys)
@@ -75,14 +77,20 @@ All Eloquent collections extend the base [Laravel collection](/docs/{{version}}/
 [implode](/docs/{{version}}/collections#method-implode)
 [intersect](/docs/{{version}}/collections#method-intersect)
 [isEmpty](/docs/{{version}}/collections#method-isempty)
+[isNotEmpty](/docs/{{version}}/collections#method-isnotempty)
 [keyBy](/docs/{{version}}/collections#method-keyby)
 [keys](/docs/{{version}}/collections#method-keys)
 [last](/docs/{{version}}/collections#method-last)
 [map](/docs/{{version}}/collections#method-map)
+[mapWithKeys](/docs/{{version}}/collections#method-mapwithkeys)
 [max](/docs/{{version}}/collections#method-max)
+[median](/docs/{{version}}/collections#method-median)
 [merge](/docs/{{version}}/collections#method-merge)
 [min](/docs/{{version}}/collections#method-min)
+[mode](/docs/{{version}}/collections#method-mode)
 [only](/docs/{{version}}/collections#method-only)
+[partition](/docs/{{version}}/collections#method-partition)
+[pipe](/docs/{{version}}/collections#method-pipe)
 [pluck](/docs/{{version}}/collections#method-pluck)
 [pop](/docs/{{version}}/collections#method-pop)
 [prepend](/docs/{{version}}/collections#method-prepend)
@@ -101,13 +109,15 @@ All Eloquent collections extend the base [Laravel collection](/docs/{{version}}/
 [sortBy](/docs/{{version}}/collections#method-sortby)
 [sortByDesc](/docs/{{version}}/collections#method-sortbydesc)
 [splice](/docs/{{version}}/collections#method-splice)
+[split](/docs/{{version}}/collections#method-split)
 [sum](/docs/{{version}}/collections#method-sum)
 [take](/docs/{{version}}/collections#method-take)
 [toArray](/docs/{{version}}/collections#method-toarray)
 [toJson](/docs/{{version}}/collections#method-tojson)
 [transform](/docs/{{version}}/collections#method-transform)
 [union](/docs/{{version}}/collections#method-union)
 [unique](/docs/{{version}}/collections#method-unique)
+[uniqueStrict](/docs/{{version}}/collections#method-uniquestrict)
 [values](/docs/{{version}}/collections#method-values)
 [where](/docs/{{version}}/collections#method-where)
 [whereStrict](/docs/{{version}}/collections#method-wherestrict)