Apply common project tweaks (round 2) (#48)

* Add dependency-check

* Add Donate section and badges to README.md

* Run hallmark

* Tweak badges and links in README.md

CONTRIBUTORS.md

@@ -3,7 +3,7 @@
 | Name                 | GitHub                                                 | Social                                                        |
 | :------------------- | :----------------------------------------------------- | :------------------------------------------------------------ |
 | **Lars-Magnus Skog** | [**@ralphtheninja**](https://github.com/ralphtheninja) | [**@ralph@social.weho.st**](https://social.weho.st/@ralph)    |
-| **Vincent Weevers**  | [**@vweevers**](https://github.com/vweevers)           | [**@vweevers@twitter**](https://twitter.com/vweevers)         |
 | **Rod Vagg**         | [**@rvagg**](https://github.com/rvagg)                 | [**@rvagg@twitter**](https://twitter.com/rvagg)               |
+| **Vincent Weevers**  | [**@vweevers**](https://github.com/vweevers)           | [**@vweevers@twitter**](https://twitter.com/vweevers)         |
 | **Julian Gruber**    | [**@juliangruber**](https://github.com/juliangruber)   | [**@juliangruber@twitter**](https://twitter.com/juliangruber) |
 | **Jose-Luis Rivas**  | [**@ghostbar**](https://github.com/ghostbar)           |                                                               |

README.md

@@ -1,15 +1,16 @@
 # level-mem
 
-> A convenience package that bundles [`levelup`](https://github.com/level/levelup) and [`memdown`](https://github.com/level/memdown) and exposes `levelup` on its export.
+> A convenience package that bundles [`levelup`](https://github.com/Level/levelup) and [`memdown`](https://github.com/Level/memdown) and exposes `levelup` on its export.
 
-[![level badge][level-badge]](https://github.com/level/awesome)
-[![npm](https://img.shields.io/npm/v/level-mem.svg)](https://www.npmjs.com/package/level-mem)
-![Node version](https://img.shields.io/node/v/level-mem.svg)
-[![Build Status](https://secure.travis-ci.org/Level/mem.png)](http://travis-ci.org/Level/mem)
-[![david](https://david-dm.org/Level/mem.svg)](https://david-dm.org/level/mem)
+[![level badge][level-badge]](https://github.com/Level/awesome)
+[![npm](https://img.shields.io/npm/v/level-mem.svg?label=&logo=npm)](https://www.npmjs.com/package/level-mem)
+[![Node version](https://img.shields.io/node/v/level-mem.svg)](https://www.npmjs.com/package/level-mem)
+[![Travis](https://img.shields.io/travis/Level/mem.svg?logo=travis&label=)](https://travis-ci.org/Level/mem)
 [![Coverage Status](https://coveralls.io/repos/github/Level/mem/badge.svg)](https://coveralls.io/github/Level/mem)
 [![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)
-[![npm](https://img.shields.io/npm/dm/level-mem.svg)](https://www.npmjs.com/package/level-mem)
+[![npm](https://img.shields.io/npm/dm/level-mem.svg?label=dl)](https://www.npmjs.com/package/level-mem)
+[![Backers on Open Collective](https://opencollective.com/level/backers/badge.svg?color=orange)](#backers)
+[![Sponsors on Open Collective](https://opencollective.com/level/sponsors/badge.svg?color=orange)](#sponsors)
 
 Use this package to avoid having to explicitly install `memdown` when you want to use `memdown` with `levelup` for non-persistent `levelup` data storage.
 
@@ -34,7 +35,7 @@ db.put('name', 'Level', function (err) {
 })
 ```
 
-See [`levelup`](https://github.com/level/levelup) and [`memdown`](https://github.com/level/memdown) for more details.
+See [`levelup`](https://github.com/Level/levelup) and [`memdown`](https://github.com/Level/memdown) for more details.
 
 **If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md).
 
@@ -46,6 +47,18 @@ See [`levelup`](https://github.com/level/levelup) and [`memdown`](https://github
 
 See the [Contribution Guide](https://github.com/Level/community/blob/master/CONTRIBUTING.md) for more details.
 
+## Donate
+
+To sustain [`Level`](https://github.com/Level) and its activities, become a backer or sponsor on [Open Collective](https://opencollective.com/level). Your logo or avatar will be displayed on our 28+ [GitHub repositories](https://github.com/Level), [npm](https://www.npmjs.com/) packages and (soon) [our website](http://leveldb.org). 💖
+
+### Backers
+
+[![Open Collective backers](https://opencollective.com/level/backers.svg?width=890)](https://opencollective.com/level)
+
+### Sponsors
+
+[![Open Collective sponsors](https://opencollective.com/level/sponsors.svg?width=890)](https://opencollective.com/level)
+
 ## License
 
 [MIT](LICENSE.md) © 2012-present [Contributors](CONTRIBUTORS.md).

package.json

@@ -7,14 +7,17 @@
   "scripts": {
     "test": "standard && hallmark && nyc node test.js",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
-    "hallmark": "hallmark --fix"
+    "hallmark": "hallmark --fix",
+    "dependency-check": "dependency-check . test.js",
+    "prepublishOnly": "npm run dependency-check"
   },
   "dependencies": {
     "level-packager": "~4.0.0",
     "memdown": "~3.0.0"
   },
   "devDependencies": {
     "coveralls": "^3.0.2",
+    "dependency-check": "^3.3.0",
     "hallmark": "^0.1.0",
     "level-community": "^3.0.0",
     "nyc": "^12.0.2",