Merge branch '36-fix-readme-remove-link-to-f-droid' into 'master'

Resolve "Fix README, remove link to f-droid"

Closes #36

See merge request android/hangman!33

README.md

 Hangman
 ========
 
-[<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
-     alt="Get it on F-Droid"
-     height="80">](https://f-droid.org/packages/org.benoitharrault.hangman/)
-
 GNU General Public License (GPLv3).

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=1.2.10
-app.versionCode=21
+app.versionName=1.2.11
+app.versionCode=22

pubspec.yaml

 name: hangman
 description: Hangman game, have fun with words and letters!
 publish_to: 'none'
-version: 1.1.3+1
+version: 1.2.11+22
 
 environment:
   sdk: '^3.0.0'