Upgrade Ubuntu in CI/CD to 20.04; 18.04 is deprecated

.github/workflows/latest.yml

@@ -7,7 +7,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                os: [ubuntu-18.04]
+                os: [ubuntu-20.04]
         runs-on: ${{ matrix.os }}
         steps:
             - uses: actions/checkout@v2
@@ -30,10 +30,10 @@ jobs:
                   code: v0.0.0-latest-master
                   name: Latest Master Release
                   body: >
-                      Latest auto release corresponding to commit ${{github.sha}} 🔥. 
+                      Latest auto release corresponding to commit ${{github.sha}} 🔥.
-                      To install do: 
+                      To install do:
                       `yarn install https://github.com/nodegui/nodegui/releases/download/v0.0.0-latest-master/nodegui-master.tgz`
-                      or 
+                      or
                       `yarn install http://master-release.nodegui.org`
                   assets: >
                       nodegui-nodegui-0.0.0-latest-master.tgz:nodegui-master.tgz:application/tar+gzip

.github/workflows/release.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             platform: linux
             arch: x64
           - os: windows-latest
@@ -30,7 +30,7 @@ jobs:
           node-version: '16.x'
 
       - name: Install ubuntu deps
-        if: contains(matrix.os, 'ubuntu-18.04')
+        if: contains(matrix.os, 'ubuntu-20.04')
         run: sudo apt install mesa-common-dev libglu1-mesa-dev
 
       - name: Install deps

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                os: [ubuntu-18.04, windows-latest, macos-latest]
+                os: [ubuntu-20.04, windows-latest, macos-latest]
         runs-on: ${{ matrix.os }}
         steps:
             - uses: actions/checkout@v2