Update go.yml

Author: matteo-grella

.github/workflows/go.yml

@@ -6,10 +6,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.15
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.15
       id: go
 
     - name: Check out code into the Go module directory
@@ -33,7 +33,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.15
     - name: Get dependencies
       run: go get -v -t -d ./...
     - name: Run tests and generate coverage report