feat(go): support new features with go code (#565)

* feat(go): support hash map chaining

* feat(go): support hash map open address

* feat(go): support simple hash

* feat(go): support top k heap

* feat(go): support subset sum I

* feat(go): support subset sum native

* feat(go): support subset sum II

* fix(go): fix some problem

codes/go/chapter_heap/heap_test.go

@@ -7,6 +7,7 @@ package chapter_heap
 import (
 	"container/heap"
 	"fmt"
+	"strconv"
 	"testing"
 
 	. "github.com/krahets/hello-algo/pkg"
@@ -88,3 +89,13 @@ func TestMyHeap(t *testing.T) {
 	isEmpty := maxHeap.isEmpty()
 	fmt.Printf("\n堆是否为空 %t\n", isEmpty)
 }
+
+func TestTopKHeap(t *testing.T) {
+	/* 初始化堆 */
+	// 初始化大顶堆
+	nums := []int{1, 7, 6, 3, 2}
+	k := 3
+	res := topKHeap(nums, k)
+	fmt.Printf("最大的 " + strconv.Itoa(k) + " 个元素为")
+	PrintHeap(*res)
+}