Remove references to TonicDev

* TonicDev became RunKit in 2016 - http://blog.runkit.com/2016/09/13/tonic-is-now-runkit-a-part-of-stripe/
* https://npm.runkit.com/pouchdb doesn't currently work
* it's likely it hasn't worked for a long time, and no one has noticed
* RunKit barely looks active itself - last blog post was in 2018: http://blog.runkit.com/

Author: alxndrsn

bin/update-package-json-for-publish.js

@@ -62,7 +62,7 @@ modules.forEach(function (mod) {
   // Also add "module" member: https://github.com/rollup/rollup/wiki/pkg.module
   pkg['jsnext:main'] = pkg.module = './lib/index.es.js';
   // whitelist the files we'll actually publish
-  pkg.files = ['lib', 'dist', 'tonic-example.js'];
+  pkg.files = ['lib', 'dist'];
 
   var jsonString = JSON.stringify(pkg, null, '  ') + '\n';
   fs.writeFileSync(pkgPath, jsonString, 'utf8');

packages/node_modules/pouchdb/package.json

@@ -14,7 +14,6 @@
   "jspm": {
     "main": "dist/pouchdb.js"
   },
-  "tonicExampleFilename": "tonic-example.js",
   "keywords": [
     "db",
     "couchdb",