fix: tolerate strings for fail-fast, max-parallel, timeout-minutes, cancel-timeout-minutes (#203)

- the model defines them as strings and can parse them either as string or their effective type (boolean, number)
- add workflow validation when reading all testdata
- add fail-fast, max-parallel, timeout-minutes, cancel-timeout-minutes to test workflows in the jobparser tests

Reviewed-on: https://code.forgejo.org/forgejo/act/pulls/203
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>

act/jobparser/testdata_test.go

@@ -1,10 +1,13 @@
 package jobparser
 
 import (
+	"bytes"
 	"embed"
 	"path/filepath"
 	"testing"
 
+	"github.com/nektos/act/pkg/model"
+
 	"github.com/stretchr/testify/require"
 )
 
@@ -12,7 +15,11 @@ import (
 var testdata embed.FS
 
 func ReadTestdata(t *testing.T, name string) []byte {
-	content, err := testdata.ReadFile(filepath.Join("testdata", name))
-	require.NoError(t, err)
+	t.Helper()
+	filename := filepath.Join("testdata", name)
+	content, err := testdata.ReadFile(filename)
+	require.NoError(t, err, filename)
+	_, err = model.ReadWorkflow(bytes.NewReader(content), true)
+	require.NoError(t, err, filename)
 	return content
 }