(feature) Add _.isSafeInteger

lodash/lodash-tests.ts

@@ -6316,6 +6316,27 @@ module TestIsRegExp {
     }
 }
 
+// _.isSafeInteger
+module TestIsSafeInteger {
+    {
+        let result: boolean;
+
+        result = _.isSafeInteger(any);
+
+        result = _(1).isSafeInteger();
+        result = _<any>([]).isSafeInteger();
+        result = _({}).isSafeInteger();
+    }
+
+    {
+        let result: _.LoDashExplicitWrapper<boolean>;
+
+        result = _(1).chain().isSafeInteger();
+        result = _<any>([]).chain().isSafeInteger();
+        result = _({}).chain().isSafeInteger();
+    }
+}
+
 // _.isString
 module TestIsString {
     {

lodash/lodash.d.ts

@@ -10182,6 +10182,50 @@ declare module _ {
         isRegExp(): LoDashExplicitWrapper<boolean>;
     }
 
+    //_.isSafeInteger
+    interface LoDashStatic {
+        /**
+         * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
+         * double precision number which isn't the result of a rounded unsafe integer.
+         *
+         * **Note:** This method is based on [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+         *
+         * @static
+         * @memberOf _
+         * @category Lang
+         * @param {*} value The value to check.
+         * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+         * @example
+         *
+         * _.isSafeInteger(3);
+         * // => true
+         *
+         * _.isSafeInteger(Number.MIN_VALUE);
+         * // => false
+         *
+         * _.isSafeInteger(Infinity);
+         * // => false
+         *
+         * _.isSafeInteger('3');
+         * // => false
+         */
+        isSafeInteger(value: any): boolean;
+    }
+
+    interface LoDashImplicitWrapperBase<T, TWrapper> {
+        /**
+         * see _.isSafeInteger
+         */
+        isSafeInteger(): boolean;
+    }
+
+    interface LoDashExplicitWrapperBase<T, TWrapper> {
+        /**
+         * see _.isSafeInteger
+         */
+        isSafeInteger(): LoDashExplicitWrapper<boolean>;
+    }
+
     //_.isString
     interface LoDashStatic {
         /**