Update github runners to oldest supported.

.github/workflows/make_release.yml

@@ -88,7 +88,7 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: artifacts/Linux error_code g++ prebuilt binaries/llfio-v2.0-binaries-linux-x64.tgz
-          asset_name: llfio-v2.0-binaries-ubuntu18.04-x64-error_code.tgz
+          asset_name: llfio-v2.0-binaries-ubuntu20.04-x64-error_code.tgz
           asset_content_type: application/gzip
 
       - name: Upload Linux 2
@@ -99,7 +99,7 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: artifacts/Linux status_code g++ prebuilt binaries/llfio-v2.0-binaries-linux-x64.tgz
-          asset_name: llfio-v2.0-binaries-ubuntu18.04-x64-status_code.tgz
+          asset_name: llfio-v2.0-binaries-ubuntu20.04-x64-status_code.tgz
           asset_content_type: application/gzip
 
       - name: Upload Linux 3
@@ -110,7 +110,7 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: artifacts/Linux error_code arm-linux-gnueabihf-g++ prebuilt binaries/llfio-v2.0-binaries-linux-armhf.tgz
-          asset_name: llfio-v2.0-binaries-ubuntu18.04-armhf-error_code.tgz
+          asset_name: llfio-v2.0-binaries-ubuntu20.04-armhf-error_code.tgz
           asset_content_type: application/gzip
 
       - name: Upload Linux 4
@@ -121,7 +121,7 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: artifacts/Linux status_code arm-linux-gnueabihf-g++ prebuilt binaries/llfio-v2.0-binaries-linux-armhf.tgz
-          asset_name: llfio-v2.0-binaries-ubuntu18.04-armhf-status_code.tgz
+          asset_name: llfio-v2.0-binaries-ubuntu20.04-armhf-status_code.tgz
           asset_content_type: application/gzip
 
       - name: Upload MacOS 1
@@ -132,7 +132,7 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: artifacts/Mac OS error_code prebuilt binaries/llfio-v2.0-binaries-darwin-x64.tgz
-          asset_name: llfio-v2.0-binaries-macos-10.15-x64-error_code.tgz
+          asset_name: llfio-v2.0-binaries-macos-11-x64-error_code.tgz
           asset_content_type: application/gzip
 
       - name: Upload MacOS 2
@@ -143,7 +143,7 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: artifacts/Mac OS status_code prebuilt binaries/llfio-v2.0-binaries-darwin-x64.tgz
-          asset_name: llfio-v2.0-binaries-macos-10.15-x64-status_code.tgz
+          asset_name: llfio-v2.0-binaries-macos-11-x64-status_code.tgz
           asset_content_type: application/gzip
 
       - name: Upload Windows 1

.github/workflows/unittests_linux.yml

@@ -11,8 +11,8 @@ on:
 
 jobs:
   Linux:
-    name: Ubuntu 18.04
-    runs-on: ubuntu-18.04
+    name: Ubuntu 20.04
+    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:

.github/workflows/unittests_macos.yml

@@ -11,8 +11,8 @@ on:
 
 jobs:
   MacOS:
-    name: Mac OS
-    runs-on: macos-latest
+    name: Mac OS 11
+    runs-on: macos-11
     strategy:
       fail-fast: false
       matrix:

.github/workflows/unittests_windows.yml

@@ -10,7 +10,7 @@ on:
   - cron: '0 0 1 * *'
 
 jobs:
-  WinVS2017:
+  WinVS2019:
     name: Visual Studio
     strategy:
       fail-fast: false
@@ -62,7 +62,7 @@ jobs:
 
   publish-test-results:
     name: "Publish Unit Tests Results"
-    needs: [WinVS2017]
+    needs: [WinVS2019]
     runs-on: ubuntu-latest
     if: success() || failure()