fix: add support for context sensitive readers

Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>

reader/reader_test.go

@@ -0,0 +1,19 @@
+package reader
+
+import (
+	"testing"
+
+	F "github.com/ibm/fp-go/function"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/ibm/fp-go/internal/utils"
+)
+
+func TestMap(t *testing.T) {
+
+	assert.Equal(t, 2, F.Pipe1(Of[string](1), Map[string](utils.Double))(""))
+}
+
+func TestAp(t *testing.T) {
+	assert.Equal(t, 2, F.Pipe1(Of[int](utils.Double), Ap[int, int, int](Of[int](1)))(0))
+}