build!: Update planetarium dependency to v0.2.0

This is a breaking change, because planetarium v0.2 output images
are calculated with higher precision and are therefore different
from equivalent planetarium v0.1 outputs.

The public package API is still the same as in versions 0.1.x.

Update failing integration tests.

Bump the package version to 0.2.0.

Author: ravenexp

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "pyplanetarium"
-version = "0.1.6"
+version = "0.2.0"
 description = "Python bindings for Rust Planetarium rendering library"
 repository = "https://github.com/ravenexp/pyplanetarium"
 authors = ["Sergey Kvachonok <ravenexp@gmail.com>"]
@@ -15,7 +15,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 pyo3 = { version = "0.18", features = ["extension-module", "abi3-py37", "generate-import-lib"] }
-planetarium = "0.1.6"
+planetarium = "0.2"
 
 [profile.release]
 lto = true

Cargo.toml

@@ -265,11 +265,11 @@ def test_export_images(self) -> None:
 
         png8_bytes = canvas.export_image(ImageFormat.PngGamma8Bpp)
         self.assertIsInstance(png8_bytes, bytes)
-        self.assertEqual(len(png8_bytes), 1283)
+        self.assertEqual(len(png8_bytes), 1301)
 
         png16_bytes = canvas.export_image(ImageFormat.PngLinear16Bpp)
         self.assertIsInstance(png16_bytes, bytes)
-        self.assertEqual(len(png16_bytes), 2737)
+        self.assertEqual(len(png16_bytes), 2743)
 
         # with open("image8.raw", "wb") as f:
         #     f.write(raw8_bytes)
@@ -325,11 +325,11 @@ def test_export_window_images(self) -> None:
 
         png8_bytes = canvas.export_window_image(wnd1, ImageFormat.PngGamma8Bpp)
         self.assertIsInstance(png8_bytes, bytes)
-        self.assertEqual(len(png8_bytes), 254)
+        self.assertEqual(len(png8_bytes), 256)
 
         png16_bytes = canvas.export_window_image(wnd2, ImageFormat.PngLinear16Bpp)
         self.assertIsInstance(png16_bytes, bytes)
-        self.assertEqual(len(png16_bytes), 667)
+        self.assertEqual(len(png16_bytes), 670)
 
     def test_export_subsampled_images(self) -> None:
         """
@@ -371,11 +371,11 @@ def test_export_subsampled_images(self) -> None:
 
         png8_bytes = canvas.export_subsampled_image((2, 2), ImageFormat.PngGamma8Bpp)
         self.assertIsInstance(png8_bytes, bytes)
-        self.assertEqual(len(png8_bytes), 425)
+        self.assertEqual(len(png8_bytes), 430)
 
         png16_bytes = canvas.export_subsampled_image((4, 4), ImageFormat.PngLinear16Bpp)
         self.assertIsInstance(png16_bytes, bytes)
-        self.assertEqual(len(png16_bytes), 311)
+        self.assertEqual(len(png16_bytes), 309)
 
     def test_export_window_error(self) -> None:
         """