Introduce UpdatePeriod

Direct AutoUpdates replacement, also get rid of ArchiSteamFarm.version, since I'm pretty sure it can be done at compile time instead.

.travis.yml

@@ -23,7 +23,7 @@ env:
     - CONFIGURATION: Release
     - DOTNET_CLI_TELEMETRY_OPTOUT: 1
     - DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
-    - RUNTIMES="generic win-x64 linux-x64 linux-arm osx-x64" # https://github.com/travis-ci/travis-ci/issues/1444
+    - VARIANTS="generic win-x64 linux-x64 linux-arm osx-x64" # NOTE: When modifying variants, don't forget to update ASF_VARIANT definitions in ASF.cs!
 
 before_script:
   - |
@@ -43,21 +43,22 @@ script:
     dotnet test ArchiSteamFarm.Tests -c "$CONFIGURATION" -o 'out/source' --no-build --no-restore
 
     publish() {
-        if [ "$1" = 'generic' ]; then
-            dotnet publish ArchiSteamFarm -c "$CONFIGURATION" -o "out/${1}" --no-restore /nologo /p:LinkDuringPublish=false
-        else
-            dotnet publish ArchiSteamFarm -c "$CONFIGURATION" -o "out/${1}" -r "$1" --no-restore /nologo
-        fi
+        local variantProperty="${1//-/_}"
+        variantProperty="ASF_VARIANT_${variantProperty^^}=1"
 
-        echo "$1" > "ArchiSteamFarm/out/${1}/ArchiSteamFarm.version"
+        if [ "$1" = 'generic' ]; then
+            dotnet publish ArchiSteamFarm -c "$CONFIGURATION" -o "out/${1}" --no-restore /nologo "/p:$variantProperty" /p:LinkDuringPublish=false
+        else
+            dotnet publish ArchiSteamFarm -c "$CONFIGURATION" -o "out/${1}" -r "$1" --no-restore /nologo "/p:$variantProperty"
+        fi
 
         if [ -d "ArchiSteamFarm/scripts/${1}" ]; then
             cp "ArchiSteamFarm/scripts/${1}/"* "ArchiSteamFarm/out/${1}"
         fi
     }
 
-    for RUNTIME in $RUNTIMES; do
-        publish "$RUNTIME" &
+    for variant in $VARIANTS; do
+        publish "$variant" &
     done
     wait