Resolve "Upgrade framework, build tools and dependencies"

Closes #65

See merge request !60

Resolve "Fix get image from assets"

Closes #64

See merge request !59

Resolve "Add / fix images"

Closes #63

See merge request !58

Resolve "Ensure all pictures are sliced in different 5x5 tiles"

Closes #61

See merge request !56

Resolve "Include source images to repository"

Closes #62

See merge request !57

Resolve "Fix metadata"

Closes #60

See merge request !55

Resolve "Fix metadata"

Closes #59

See merge request !54

Resolve "Remove iOS variant"

Closes #57

See merge request !53

Resolve "Upgrade flutter framework and dependencies"

Closes #58

See merge request !52

Resolve "Fix application game name"

Closes #54

See merge request !51

Resolve "Enable splash screen"

Closes #56

See merge request !50

Resolve "Add a "moves count" indicator"

Closes #55

See merge request !49

Resolve "Add a "pick random image" button"

Closes #49

See merge request !48

Resolve "Clean data provider code"

Closes #52

See merge request !47

Resolve "Normalize layout"

Closes #48

See merge request !46

Resolve "Fix / update layout"

Closes #47

See merge request !45

Resolve "Add personal pictures"

Closes #46

See merge request !44

Resolve "Improve app metadata, include fdroid metadata in repository"

Closes #43

See merge request !41

Resolve "Upgrade Flutter framework and dependencies"

Closes #45

See merge request !43

Resolve "Clean code"

Closes #44

See merge request !42