feat: add js solution to lc problem: No.1860.Incremental Memory Leak (doocs#395)

Author: zhaocchen

solution/1800-1899/1860.Incremental Memory Leak/README.md

@@ -99,6 +99,28 @@ class Solution {
 }
 ```
 
+### **JavaScript**
+
+```js
+/**
+ * @param {number} memory1
+ * @param {number} memory2
+ * @return {number[]}
+ */
+var memLeak = function(memory1, memory2) {
+    let i = 1;
+    while (memory1 >= i || memory2 >= i) {
+        if (memory1 >= memory2) {
+            memory1 -= i;
+        } else {
+            memory2 -= i;
+        }
+        i++;
+    }
+    return [i, memory1, memory2];
+};
+```
+
 ### **...**
 
 ```

solution/1800-1899/1860.Incremental Memory Leak/README_EN.md

@@ -91,6 +91,28 @@ class Solution {
 }
 ```
 
+### **JavaScript**
+
+```js
+/**
+ * @param {number} memory1
+ * @param {number} memory2
+ * @return {number[]}
+ */
+var memLeak = function(memory1, memory2) {
+    let i = 1;
+    while (memory1 >= i || memory2 >= i) {
+        if (memory1 >= memory2) {
+            memory1 -= i;
+        } else {
+            memory2 -= i;
+        }
+        i++;
+    }
+    return [i, memory1, memory2];
+};
+```
+
 ### **...**
 
 ```

solution/1800-1899/1860.Incremental Memory Leak/Solution.js

@@ -0,0 +1,17 @@
+/**
+ * @param {number} memory1
+ * @param {number} memory2
+ * @return {number[]}
+ */
+ var memLeak = function(memory1, memory2) {
+    let i = 1;
+    while (memory1 >= i || memory2 >= i) {
+        if (memory1 >= memory2) {
+            memory1 -= i;
+        } else {
+            memory2 -= i;
+        }
+        i++;
+    }
+    return [i, memory1, memory2];
+};