Update generate icons info file.

Signed-off-by: Ivan Sein <ivan@nextcloud.com>

docs/Generate-app-icons.md

@@ -1,22 +1,30 @@
 # Generate app icons from SVG
 
-## Install Inkscape
-
-```
-$ brew install caskformula/caskformula/inkscape
-```
-
-## Install Inkscape (macOS Mojave)
+## Install Inkscape (macOS Mojave or higher)
 
 ```
 $ brew tap homebrew/cask
 $ brew cask install inkscape
 ```
 
-## Run next commands
+## Run next commands (using inkscape 1.0 or higher)
 
 ```
-$ ruby -e '[29,57,40,50,72,76,1024].each { |x| `inkscape --export-png talk-icon#{x}@1x.png -w #{x} icon-talk-ios.svg` }'
+$ ruby -e '[20,29,57,40,50,72,76,1024].each { |x| `inkscape --export-type=png --export-file=talk-icon#{x}@1x.png -w #{x} icon-talk-ios.svg` }'
+$ ruby -e '[40,58,80,114,120,80,100,144,152,167].each { |x| `inkscape --export-type=png --export-file=talk-icon#{x}@2x.png -w #{x} icon-talk-ios.svg` }'
+$ ruby -e '[60,87,120,180].each { |x| `inkscape --export-type=png --export-file=talk-icon#{x}@3x.png -w #{x} icon-talk-ios.svg` }'
+```
+
+## Install Inkscape (old)
+
+```
+$ brew install caskformula/caskformula/inkscape
+```
+
+## Run next commands (old)
+
+```
+$ ruby -e '[20,29,57,40,50,72,76,1024].each { |x| `inkscape --export-png talk-icon#{x}@1x.png -w #{x} icon-talk-ios.svg` }'
 $ ruby -e '[40,58,80,114,120,80,100,144,152,167].each { |x| `inkscape --export-png talk-icon#{x}@2x.png -w #{x} icon-talk-ios.svg` }'
 $ ruby -e '[60,87,120,180].each { |x| `inkscape --export-png talk-icon#{x}@3x.png -w #{x} icon-talk-ios.svg` }'
 ```