Add extensions for packages that need them in node ESM

Author: IanVS

src/to-have-form-values.js

@@ -1,5 +1,5 @@
-import isEqualWith from 'lodash/isEqualWith'
-import uniq from 'lodash/uniq'
+import isEqualWith from 'lodash/isEqualWith.js'
+import uniq from 'lodash/uniq.js'
 import escape from 'css.escape'
 import {
   checkHtmlElement,

src/to-have-value.js

@@ -1,4 +1,4 @@
-import isEqualWith from 'lodash/isEqualWith'
+import isEqualWith from 'lodash/isEqualWith.js'
 import {
   checkHtmlElement,
   compareArraysAsSet,

src/utils.js

@@ -1,6 +1,6 @@
 import redent from 'redent'
-import cssParse from 'css/lib/parse'
-import isEqual from 'lodash/isEqual'
+import cssParse from 'css/lib/parse/index.js'
+import isEqual from 'lodash/isEqual.js'
 
 class GenericTypeError extends Error {
   constructor(expectedString, received, matcherFn, context) {