Ubuntu 20.04

Author: hannesa2

.github/env-checks/test-ubuntu-18-04.yml .github/env-checks/test-ubuntu-20-04.yml.github/env-checks/test-ubuntu-18-04.yml renamed to .github/env-checks/test-ubuntu-20-04.yml

@@ -2,7 +2,7 @@ name: "Test hypervisor support on ubuntu"
 on: push
 jobs:
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - run: cat /sys/hypervisor/properties/capabilities || true
         name: xen

.github/workflows/test-linux.yml

@@ -2,7 +2,7 @@ name: "Test Linux"
 on: [push, pull_request]
 jobs:
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v1
     - name: test install-sdk