Improve error messages for invalid resize parameters

Dependency version bumps and doc refresh

lib/is.js

@@ -80,6 +80,21 @@ const inArray = function (val, list) {
   return list.indexOf(val) !== -1;
 };
 
+/**
+ * Create an Error with a message relating to an invalid parameter.
+ *
+ * @param {String} name - parameter name.
+ * @param {String} expected - description of the type/value/range expected.
+ * @param {*} actual - the value received.
+ * @returns {Error} Containing the formatted message.
+ * @private
+ */
+const invalidParameterError = function (name, expected, actual) {
+  return new Error(
+    `Expected ${expected} for ${name} but received ${actual} of type ${typeof actual}`
+  );
+};
+
 module.exports = {
   defined: defined,
   object: object,
@@ -90,5 +105,6 @@ module.exports = {
   number: number,
   integer: integer,
   inRange: inRange,
-  inArray: inArray
+  inArray: inArray,
+  invalidParameterError: invalidParameterError
 };