- Because there is not full image url in the dom, we replace "image_url" with the same url as the "url" (url of source).
  See example HTML https://gist.github.com/Nachtalb/2dea8a4d2c723c49226ad9645838121f
- Remove unused import
- Fix google image search title
- Keep google image safe value up to date

[fix] DuckDuckGo Images requests

Use HTTPS for crossref

[fix] get YouTube results

[fix] Stop engine from sending duplicated requests

Results are not appearing in the html document anymore,
instead they are found inside an object embedded in a script.

[fix] google scholar suggestions

[Engine] adds apkmirror search engine

Add accidentally removed import to search.py

Remove asksteem

[FIX] image_proxify

docker: allow configuring http proxy via env variables

Unsplash image engine

setup: Skip test files

[fix] Unicode error with WolframAlpha API engine (fixes #1480)