add missing pybind11 include

There are arguments of type `std::vector` in `Point.Offset` (located in the file `src/skia/Point.cpp`) and `BBoxHierarchy.search` (located in the file `src/skia/Picture.cpp`), but the corresponding files do not include `#include <pybind11/stl.h>`. Add the include statement and supplement with related tests.

Author: MeetWq

src/skia/Picture.cpp

@@ -3,6 +3,7 @@
 #include <include/core/SkBBHFactory.h>
 #include <include/core/SkPictureRecorder.h>
 #include <pybind11/operators.h>
+#include <pybind11/stl.h>
 
 namespace {
 

src/skia/Point.cpp

@@ -1,6 +1,7 @@
 #include "common.h"
 #include <include/core/SkPoint3.h>
 #include <pybind11/operators.h>
+#include <pybind11/stl.h>
 
 void initPoint(py::module &m) {
 // IPoint

tests/test_picture.py

@@ -62,8 +62,30 @@ def test_Picture_MakePlaceholder():
         skia.Picture.MakePlaceholder(skia.Rect(100, 100)), skia.Picture)
 
 
-def test_PictureRecorder_init():
-    assert isinstance(skia.PictureRecorder(), skia.PictureRecorder)
+def test_RTreeFactory_init():
+    assert isinstance(skia.RTreeFactory(), skia.RTreeFactory)
+
+
+def test_RTreeFactory_call():
+    rtree = skia.RTreeFactory()()
+    assert isinstance(rtree, skia.BBoxHierarchy)
+
+
+@pytest.fixture
+def rtree():
+    return skia.RTreeFactory()()
+
+
+def test_BBoxHierarchy_init():
+    assert isinstance(skia.BBoxHierarchy(), skia.BBoxHierarchy)
+
+
+def test_BBoxHierarchy_insert(rtree):
+    rtree.insert(skia.Rect(100, 100), 1)
+
+
+def test_BBoxHierarchy_search(rtree):
+    rtree.search(skia.Rect(100, 100), [])
 
 
 @pytest.mark.parametrize('args', [

tests/test_point.py

@@ -105,6 +105,13 @@ def test_Point_init(args):
     assert isinstance(skia.Point(*args), skia.Point)
 
 
+def test_Point_Offset():
+    points = [skia.Point(1, 2), skia.Point(3, 4)]
+    points = skia.Point.Offset(points, 1, 1)
+    assert points[0].equals(2, 3)
+    assert points[1].equals(4, 5)
+
+
 def test_Point_x(point):
     assert point.x() == 4