ci/cd adjustments:

- enabled deterministic build, reenabled symbol publishing
- fixed PackageProjectUrl
- removed Travis, added Linux build into the AppVeyor matrix

Author: Sergey Komisarchik

.travis.yml

@@ -20,7 +20,7 @@ foreach ($src in dir src/*) {
 
 	echo "build: Packaging project in $src"
 
-    & dotnet pack -c Release -o ..\..\artifacts --version-suffix=$suffix
+    & dotnet pack -c Release -o ..\..\artifacts --version-suffix=$suffix -p:ContinuousIntegrationBuild=true
     if ($LASTEXITCODE -ne 0) { exit 1 }
 
     Pop-Location
@@ -42,10 +42,25 @@ foreach ($test in dir test/*.Tests) {
 
 	echo "build: Testing project in $test"
 
-    & dotnet test -c Release
+    if ($PSVersionTable.Platform -eq "Unix") {
+        & dotnet test -c Release -f netcoreapp2.0
+        & dotnet test -c Release -f netcoreapp3.1
+    } else {
+        & dotnet test -c Release
+    }
+
     if ($LASTEXITCODE -ne 0) { exit 3 }
 
     Pop-Location
 }
 
+if ($PSVersionTable.Platform -eq "Unix") {
+    Push-Location sample/Sample
+
+    & dotnet run -f netcoreapp2.0 -c Release --run-once
+    if ($LASTEXITCODE -ne 0) { exit 4 }
+
+    Pop-Location
+}
+
 Pop-Location

Build.ps1

@@ -1,9 +1,18 @@
 version: '{build}'
 skip_tags: true
-image: Visual Studio 2019
+image:
+  - Visual Studio 2019
+  - Ubuntu1604
 configuration: Release
 build_script:
 - ps: ./Build.ps1
+for:
+-
+  matrix:
+    only:
+      - image: Ubuntu1604
+  build_script:
+  - pwsh ./Build.ps1
 test: off
 artifacts:
 - path: artifacts/Serilog.*.nupkg
@@ -12,7 +21,6 @@ deploy:
 - provider: NuGet
   api_key:
     secure: b7jxRe5kR3kuxMrmdDuN0jvaaWWHwtFRnAwFZZV6MdaorwUhASR/Ey1gPn6vXwND
-  skip_symbols: true
   on:
     branch: /^(master|dev)$/
 - provider: GitHub

appveyor.yml

@@ -13,6 +13,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "assets", "assets", "{62D0B9
 		Build.ps1 = Build.ps1
 		CHANGES.md = CHANGES.md
 		Directory.Build.props = Directory.Build.props
+		global.json = global.json
 		assets\icon.png = assets\icon.png
 		LICENSE = LICENSE
 		README.md = README.md