feat: default Vega-Lite-based renderer (#342)

.github/workflows/book.yml

@@ -7,7 +7,9 @@ on:
 
 jobs:
   book:
-    runs-on: ubuntu-latest
+    # https://github.com/actions/setup-python/issues/162#issuecomment-1325307787
+    # FIXME: temp change to ubuntu-20.04 from ubuntu-latest to fix python can not found error
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v3

.github/workflows/codeql.yml

@@ -11,7 +11,9 @@ on:
 jobs:
   analyze:
     name: Analyze
-    runs-on: ubuntu-latest
+    # https://github.com/actions/setup-python/issues/162#issuecomment-1325307787
+    # FIXME: temp change to ubuntu-20.04 from ubuntu-latest to fix python can not found error
+    runs-on: ubuntu-20.04
     permissions:
       actions: read
       contents: read

.github/workflows/test.yml

@@ -8,7 +8,9 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    # https://github.com/actions/setup-python/issues/162#issuecomment-1325307787
+    # FIXME: temp change to ubuntu-20.04 from ubuntu-latest to fix python can not found error
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v3
@@ -37,7 +39,9 @@ jobs:
           fail_ci_if_error: true
 
   lint:
-    runs-on: ubuntu-latest
+    # https://github.com/actions/setup-python/issues/162#issuecomment-1325307787
+    # FIXME: temp change to ubuntu-20.04 from ubuntu-latest to fix python can not found error
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v3

draco/renderer/__init__.py

@@ -0,0 +1,5 @@
+from draco.renderer.altair.altair_renderer import AltairRenderer
+
+from .base_renderer import BaseRenderer
+
+__all__ = ["BaseRenderer", "AltairRenderer"]