Add Chai globals (#247)

Author: TomerFi

data/chai.mjs

@@ -0,0 +1,5 @@
+export default {
+	assert: true,
+	expect: true,
+	should: true,
+};

globals.json

@@ -1204,6 +1204,11 @@
 		"WeakRef": false,
 		"WeakSet": false
 	},
+	"chai": {
+		"assert": true,
+		"expect": true,
+		"should": true
+	},
 	"commonjs": {
 		"exports": true,
 		"global": false,