build: update to go1.21rc3 and make go1.19 the minimum required version

Signed-off-by: Anagh Kumar Baranwal <6824881+darthShadow@users.noreply.github.com>

.github/workflows/build.yml

@@ -27,12 +27,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        job_name: ['linux', 'linux_386', 'mac_amd64', 'mac_arm64', 'windows', 'other_os', 'go1.18', 'go1.19']
+        job_name: ['linux', 'linux_386', 'mac_amd64', 'mac_arm64', 'windows', 'other_os', 'go1.19', 'go1.20']
 
         include:
           - job_name: linux
             os: ubuntu-latest
-            go: '1.20'
+            go: '1.21.0-rc.3'
             gotags: cmount
             build_flags: '-include "^linux/"'
             check: true
@@ -43,14 +43,14 @@ jobs:
 
           - job_name: linux_386
             os: ubuntu-latest
-            go: '1.20'
+            go: '1.21.0-rc.3'
             goarch: 386
             gotags: cmount
             quicktest: true
 
           - job_name: mac_amd64
             os: macos-11
-            go: '1.20'
+            go: '1.21.0-rc.3'
             gotags: 'cmount'
             build_flags: '-include "^darwin/amd64" -cgo'
             quicktest: true
@@ -59,14 +59,14 @@ jobs:
 
           - job_name: mac_arm64
             os: macos-11
-            go: '1.20'
+            go: '1.21.0-rc.3'
             gotags: 'cmount'
             build_flags: '-include "^darwin/arm64" -cgo -macos-arch arm64 -cgo-cflags=-I/usr/local/include -cgo-ldflags=-L/usr/local/lib'
             deploy: true
 
           - job_name: windows
             os: windows-latest
-            go: '1.20'
+            go: '1.21.0-rc.3'
             gotags: cmount
             cgo: '0'
             build_flags: '-include "^windows/"'
@@ -76,23 +76,23 @@ jobs:
 
           - job_name: other_os
             os: ubuntu-latest
-            go: '1.20'
+            go: '1.21.0-rc.3'
             build_flags: '-exclude "^(windows/|darwin/|linux/)"'
             compile_all: true
             deploy: true
 
-          - job_name: go1.18
-            os: ubuntu-latest
-            go: '1.18'
-            quicktest: true
-            racequicktest: true
-
           - job_name: go1.19
             os: ubuntu-latest
             go: '1.19'
             quicktest: true
             racequicktest: true
 
+          - job_name: go1.20
+            os: ubuntu-latest
+            go: '1.20'
+            quicktest: true
+            racequicktest: true
+
     name: ${{ matrix.job_name }}
 
     runs-on: ${{ matrix.os }}
@@ -130,6 +130,11 @@ jobs:
       - name: Install Libraries on macOS
         shell: bash
         run: |
+          # https://github.com/Homebrew/brew/issues/15621#issuecomment-1619266788
+          # https://github.com/orgs/Homebrew/discussions/4612#discussioncomment-6319008
+          unset HOMEBREW_NO_INSTALL_FROM_API
+          brew untap --force homebrew/core
+          brew untap --force homebrew/cask
           brew update
           brew install --cask macfuse
         if: matrix.os == 'macos-11'
@@ -239,7 +244,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.3'
           check-latest: true
 
       - name: Install govulncheck
@@ -264,7 +269,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.3'
 
       - name: Go module cache
         uses: actions/cache@v3