Some dep updates

* Please read their CHANGELOGs
* Delete op retested

NOTES:
* Squashing one *mongoose*/MongoDB deprecation ... doesn't appear to negatively affect anything in dev. Applies to OpenUserJS#1516
* Some bug fixes from at least one of our major deps
* DB backend updated

app.js

@@ -79,7 +79,9 @@ if (isPro) {
     useNewUrlParser: true,
     poolSize: defaultPoolSize,
     reconnectTries: 30,
-    reconnectInterval: 1000
+    reconnectInterval: 1000,
+
+    useFindAndModify: false // #1516
   }
 }
 

package.json

@@ -7,7 +7,7 @@
     "ace-builds": "git://github.com/ajaxorg/ace-builds.git#5fe4368",
     "ansi-colors": "3.2.4",
     "async": "2.6.2",
-    "aws-sdk": "2.462.0",
+    "aws-sdk": "2.464.0",
     "base62": "2.0.1",
     "body-parser": "1.19.0",
     "bootstrap": "3.4.1",
@@ -16,20 +16,20 @@
     "compression": "1.7.4",
     "connect-mongo": "2.0.3",
     "diff": "4.0.1",
-    "express": "4.17.0",
+    "express": "4.17.1",
     "express-minify": "1.0.0",
-    "express-rate-limit": "4.0.1",
+    "express-rate-limit": "4.0.2",
     "express-session": "1.16.1",
     "font-awesome": "4.7.0",
     "formidable": "1.2.1",
     "git-rev": "0.2.1",
     "github": "git://github.com/octokit/rest.js.git#29dedb3",
-    "highlight.js": "9.15.6",
+    "highlight.js": "9.15.8",
     "image-size": "0.7.4",
     "ip-range-check": "0.0.2",
     "jquery": "3.4.1",
     "js-beautify": "1.10.0",
-    "jsdom": "15.1.0",
+    "jsdom": "15.1.1",
     "less-middleware": "3.1.0",
     "marked": "0.6.2",
     "media-type": "0.3.1",