fix: upstream node.js changes (#121)

Author: anonrig

punycode.js

@@ -342,7 +342,7 @@ const encode = function(input) {
 			if (currentValue < n && ++delta > maxInt) {
 				error('overflow');
 			}
-			if (currentValue == n) {
+			if (currentValue === n) {
 				// Represent delta as a generalized variable-length integer.
 				let q = delta;
 				for (let k = base; /* no condition */; k += base) {
@@ -359,7 +359,7 @@ const encode = function(input) {
 				}
 
 				output.push(stringFromCharCode(digitToBasic(q, 0)));
-				bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+				bias = adapt(delta, handledCPCountPlusOne, handledCPCount === basicLength);
 				delta = 0;
 				++handledCPCount;
 			}