Fixed:
* #30 Fixed error when captive portal service is present but disabled

New features:
* #28 Added a timeout in the DoH queries as well as a check of a captive portal;
by default the timeout is 5000 ms

Fixed:
* Upgrade packages
* #29 #16 Instead of using a complex polyfill of node’s https module, directly
use fetch(); this solves a minor security warning; the library dohjs is forked
and statically included in this package
* Fixed a race error

Changed:
* Added translations for Chinese (简化字; zh-hans) thanks to Outbreak2096
* Added translations for Dutch (Nederlands; nl) thanks to Benniest
* Added translations for Estonian (Eesti; et) thanks to Priit Jõerüüt
* Added translations for German (Deutsch; de) thanks to Seb35
* Added property data_collection_permissions in manifest.json to declare no data collection, but added a note to make sure the users are aware that DNS requests are sent to their resolver

Fixed:
* #25 DANE websites are only correct on the second visit in some circumstances

Changed:
* Changed the colour of error icon from White to Silver
* Added changelog

Fixed:
* #2 Flickering padlock on non-local PDF files and DNSSEC websites
* #24 IPv4 domains are seen as DNSSEC-secured
* Optimisation