Fix CI and add first fuzz test

.github/workflows/ci-go-cover.yml

@@ -15,7 +15,7 @@
 # 2. Update README.md to use the new path to badge.svg because the path includes the workflow name.
 
 name: cover ≥89%
-on: [push]
+on: [push, pull_request]
 jobs:
 
   # Verify minimum coverage is reached using `go test -short -cover` on latest-ubuntu with default version of Go.
@@ -25,9 +25,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
-    - name: Install test cases
-      run: make install
+      uses: actions/checkout@v2      
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.18.x
     - name: Go Coverage
       run: |
         go version

.github/workflows/ci.yml

@@ -1,25 +1,22 @@
 # GitHub Actions - CI for Go to build & test.  See ci-go-cover.yml and linters.yml for code coverage and linters.
 # Taken from: https://github.com/fxamacker/cbor/workflows/ci.yml (thanks!)
 name: ci
-on: [push]
+on: [push, pull_request]
 jobs:
 
   # Test on various OS with default Go version. 
   tests:
-    name: Test on ${{matrix.os}}
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: [1.17.x, 1.18.x]
     runs-on: ubuntu-latest
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v1
+    - name: Install Go
+      uses: actions/setup-go@v2
       with:
-        fetch-depth: 1
-    - name: Get dependencies
-      run: go get -v -t -d ./...
-    - name: Build project
-      run: go build .
-    - name: Install test cases
-      run: make install
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v2
     - name: Run tests
-      run: |
-        go version
-        go test -short -race -v .
+      run: go test -race -v .