Use workflow variables for tool versions in workflows

Placement of this information at the top of the file, where it is easy to find and edit, facilitates updates to the
workflows as the tool versions used for project development are bumped periodically.

Author: per1234

.github/workflows/check-go.yml

@@ -1,5 +1,9 @@
 name: Check Go
 
+env:
+  # See: https://github.com/actions/setup-go/tree/v2#readme
+  GO_VERSION: "1.16"
+
 # See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
 on:
   push:
@@ -30,6 +34,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
       - name: Install Taskfile
         uses: arduino/setup-task@v1
         with:
@@ -46,6 +55,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
       - name: Install Taskfile
         uses: arduino/setup-task@v1
         with:
@@ -62,6 +76,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
       - name: Install Taskfile
         uses: arduino/setup-task@v1
         with:

.github/workflows/release.yml

@@ -1,5 +1,9 @@
 name: Create Release
 
+env:
+  # See: https://github.com/actions/setup-go/tree/v2#readme
+  GO_VERSION: "1.14"
+
 on:
   push:
     tags:
@@ -29,7 +33,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v2
         with:
-          go-version: "1.14"
+          go-version: ${{ env.GO_VERSION }}
 
       - name: Build project
         run: task go:build

.github/workflows/test-go.yml

@@ -1,5 +1,9 @@
 name: Test Go
 
+env:
+  # See: https://github.com/actions/setup-go/tree/v2#readme
+  GO_VERSION: "1.14"
+
 # See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
 on:
   push:
@@ -30,7 +34,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v2
         with:
-          go-version: "1.14"
+          go-version: ${{ env.GO_VERSION }}
 
       - name: Install Taskfile
         uses: arduino/setup-task@v1

.github/workflows/test-integration.yml

@@ -1,5 +1,11 @@
 name: Test Integration
 
+env:
+  # See: https://github.com/actions/setup-go/tree/v2#readme
+  GO_VERSION: "1.14"
+  # See: https://github.com/actions/setup-python/tree/v2#available-versions-of-python
+  PYTHON_VERSION: "3.9"
+
 # See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
 on:
   push:
@@ -36,12 +42,12 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v2
         with:
-          go-version: "1.14"
+          go-version: ${{ env.GO_VERSION }}
 
       - name: Install Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.9"
+          python-version: ${{ env.PYTHON_VERSION }}
 
       - name: Install Poetry
         run: pip install poetry

go.mod

@@ -1,6 +1,6 @@
 module github.com/arduino/library-registry-submission-parser/parser
 
-go 1.14
+go 1.16
 
 require (
 	github.com/arduino/go-paths-helper v1.6.1