GitHub env file support (#426)

* Upgrade to the official golangci-lint action and fix some issues it found

* Update deps

* Remove a shadow warning

* Initialize the splitPattern only once

* Initial attempt at supporting $GITHUB_ENV

Needs some polishing and tests

* Now it's actually working

* Replace golang.org/x/crypto/ssh/terminal with golang.org/x/term

* Disable the issue-228 test again

* The linter is picky

* Discovered that the workflow/envs.txt had to exist in certain cases

* Fix small linter issue

.github/workflows/push.yml

@@ -7,11 +7,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: docker://golangci/golangci-lint:v1.23.8
-      with:
-        args: golangci-lint run
+    - uses: golangci/golangci-lint-action@v2
       env:
         CGO_ENABLED: 0
+      with:
+        version: v1.32.2
 
   test:
     name: Test
@@ -35,7 +35,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: GoReleaser
-      uses: goreleaser/goreleaser-action@v1
+      uses: goreleaser/goreleaser-action@v2
       with:
         version: latest
         args: release --snapshot --rm-dist

.github/workflows/test-expressions.yml

@@ -8,6 +8,7 @@ env:
   KEY_WITH_UNDERSCORES: value_with_underscores
   SOMETHING_TRUE: true
   SOMETHING_FALSE: false
+  ACT: true
 
 
 jobs: