feat(upgrade): migrate to ESM

Author: gfortaine

CHANGELOG.md

@@ -1,5 +1,8 @@
 # CHANGELOG
 
+## 3.0.0
+- This package is now pure ESM. Please [read this](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).
+
 ## 2.0.1
 This release adds support for esmodule imports (see #4).
 

jasmine.json

@@ -1,6 +1,6 @@
 {
     "spec_dir": "lib",
     "spec_files": [
-        "**/*.spec.js"
+        "**/*.spec.cjs"
     ]
 }