update comment on CreateContext, update Travis go versions

.travis.yml

@@ -8,8 +8,8 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then rm "wkhtmltox_0.12.6-1.bionic_amd64.deb" ; fi
 go:
   - tip
+  - 1.16
   - 1.15
-  - 1.14
 script: go test -v -coverprofile=coverage.txt -covermode=atomic -bench .
 os:
   - linux

wkhtmltopdf.go

@@ -286,10 +286,10 @@ func (pdfg *PDFGenerator) findPath() error {
 
 // Create creates the PDF document and stores it in the internal buffer if no error is returned
 func (pdfg *PDFGenerator) Create() error {
-	return pdfg.run(context.TODO())
+	return pdfg.run(context.Background())
 }
 
-// Create creates the PDF document and stores it in the internal buffer if no error is returned
+// CreateContext is Create with a context passed to exec.CommandContext when calling wkhtmltopdf
 func (pdfg *PDFGenerator) CreateContext(ctx context.Context) error {
 	return pdfg.run(ctx)
 }