⬆️ Add support for mongodb5

This change adds support for [`mongodb` v5][1]. The headline breaking
change here is dropping support for callbacks (and forcing consumers to
use promises instead).

This library already internally uses promises, so we just need to tweak
a couple of tests that were using callbacks.

[1]: https://github.com/mongodb/node-mongodb-native/releases/tag/v5.0.0

Author: alecgibson

package.json

@@ -4,7 +4,7 @@
   "description": "MongoDB milestone snapshot database adapter for ShareDB",
   "main": "lib/index.js",
   "dependencies": {
-    "mongodb": "^2.2.36 || ^3.0.0 || ^4.0.0",
+    "mongodb": "^2.2.36 || ^3.0.0 || ^4.0.0 || ^5.0.0",
     "sharedb": "^1.0.0 || ^2.0.0 || ^3.0.0"
   },
   "devDependencies": {
@@ -15,6 +15,7 @@
     "mongodb2": "npm:mongodb@^2.2.36",
     "mongodb3": "npm:mongodb@^3.0.0",
     "mongodb4": "npm:mongodb@^4.0.0",
+    "mongodb5": "npm:mongodb@^5.0.0",
     "nyc": "^15.1.0"
   },
   "scripts": {

test/mongo-milestone-db.js

@@ -6,7 +6,12 @@ const mongodbRequire = require('../lib/mongodb');
 
 const MONGO_URL = process.env.TEST_MONGO_URL || 'mongodb://localhost:27017/test';
 
-['mongodb2', 'mongodb3', 'mongodb4'].forEach((driver) => {
+[
+  'mongodb2',
+  'mongodb3',
+  'mongodb4',
+  'mongodb5',
+].forEach((driver) => {
   const mongodb = require(driver);
 
   function create(options, callback) {
@@ -111,8 +116,7 @@ const MONGO_URL = process.env.TEST_MONGO_URL || 'mongodb://localhost:27017/test'
 
           db.saveMilestoneSnapshot('testcollection', snapshot, (saveError) => {
             if (saveError) return done(saveError);
-            mongo.collection('m_testcollection').indexInformation((indexError, indexes) => {
-              if (indexError) return done(indexError);
+            mongo.collection('m_testcollection').indexInformation().then((indexes) => {
               expect(indexes.d_1_v_1).to.be.ok;
               expect(indexes['m.mtime_1']).to.be.ok;
               done();
@@ -163,8 +167,7 @@ const MONGO_URL = process.env.TEST_MONGO_URL || 'mongodb://localhost:27017/test'
 
           db.saveMilestoneSnapshot('testcollection', snapshot, (saveError) => {
             if (saveError) return done(saveError);
-            mongo.collection('m_testcollection').indexInformation((indexError, indexes) => {
-              if (indexError) return done(indexError);
+            mongo.collection('m_testcollection').indexInformation().then((indexes) => {
               expect(indexes.id_1_v_1).not.to.be.ok;
               done();
             });