Fix eslint warnings

Author: garyb

src/Data/EuclideanRing.js

@@ -8,14 +8,14 @@ exports.intDegree = function (x) {
 // https://en.m.wikipedia.org/wiki/Modulo_operation.
 exports.intDiv = function (x) {
   return function (y) {
-    if (y == 0) return 0;
+    if (y === 0) return 0;
     return y > 0 ? Math.floor(x / y) : -Math.floor(x / -y);
   };
 };
 
 exports.intMod = function (x) {
   return function (y) {
-    if (y == 0) return 0;
+    if (y === 0) return 0;
     var yy = Math.abs(y);
     return ((x % yy) + yy) % yy;
   };