Revert back to 1.2.1.

This reverts commit 8936f7e.

.travis.yml

@@ -1,5 +1,3 @@
 language: node_js
 node_js:
   - "node"
-  - "12"
-  - "10"

Makefile

@@ -1,16 +1,15 @@
-PJ=package.json
 TS=combinatorics.ts
 JS=combinatorics.js
 MJS=combinatorics.mjs
 DTS=combinatorics.d.ts
 
-all: $(PJ) $(JS)
+all: $(JS)
 
-$(JS): $(PJ) $(TS)
+$(JS): $(TS)
 	tsc -d --target es6 $(TS)
 
-test: $(PJ) $(JS)
-	mocha --require @babel/register
+test: $(JS)
+	mocha --require esm
 
 clean:
 	-rm $(DTS) $(MJS) $(JS)

package.json

@@ -1,7 +1,6 @@
 {
   "name": "js-combinatorics",
   "version": "1.2.1",
-  "type" : "module",
   "description": "Simple combinatorics like power set, combination, and permutation in JavaScript",
   "main": "combinatorics.js",
   "module": "combinatorics.js",
@@ -14,11 +13,6 @@
   "devDependencies": {
     "typescript": "^3.9.7",
     "@types/node": "^14.0.26",
-    "@babel/core": "^7.10.4",
-    "@babel/plugin-proposal-export-namespace-from": "^7.10.4",
-    "@babel/plugin-transform-runtime": "^7.10.4",
-    "@babel/preset-env": "^7.10.4",
-    "@babel/register": "^7.10.4",
     "mocha": "^8.0.0",
     "chai": "^4.2.0"
   },

test/00-node.js

@@ -1,4 +1,2 @@
-// global.chai = require('chai');
-import chai from 'chai';
-global.chai = chai;
+global.chai = require('chai');
 global.isLegacySafari = false;