updated mathMod to include placeholder definition

types/ramda/index.d.ts

@@ -1376,6 +1376,7 @@ declare namespace R {
          * mathMod(-17, 5) is 3. mathMod requires Integer arguments, and returns NaN
          * when the modulus is zero or negative.
          */
+        mathMod(__: Placeholder, b: number): (a: number) => number;
         mathMod(a: number, b: number): number;
         mathMod(a: number): (b: number) => number;
 

types/ramda/ramda-tests.ts

@@ -132,6 +132,7 @@ class F2 {
   R.divide(R.__, 2)(42); // 21
   R.gt(R.__, 2)(10); // true
   R.has(R.__, {x: 0, y: 0})('x'); // true;
+  R.mathMod(R.__, 12)(15); // 3
 };
 
 () => {