Add extra version of py-widgetsnbextension (#15105)

* Add extra version of py-widgetsnbextension

* Update dependency version

* Update package.py

* Update package.py

* Update var/spack/repos/builtin/packages/py-widgetsnbextension/package.py

Co-Authored-By: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

var/spack/repos/builtin/packages/py-widgetsnbextension/package.py

@@ -12,8 +12,12 @@ class PyWidgetsnbextension(PythonPackage):
     homepage = "https://pypi.python.org/pypi/widgetsnbextension"
     url      = "https://pypi.io/packages/source/w/widgetsnbextension/widgetsnbextension-1.2.6.tar.gz"
 
+    version('3.5.1', sha256='079f87d87270bce047512400efd70238820751a11d2d8cb137a5a5bdbaf255c7')
+    version('3.4.2', sha256='fa618be8435447a017fd1bf2c7ae922d0428056cfc7449f7a8641edf76b48265')
+    version('3.3.0', sha256='c5280a62d293735cdadc7b8884e2affcfb0488420ee09963577f042359726392')
     version('1.2.6', sha256='c618cfb32978c9517caf0b4ef3aec312f8dd138577745e7b0d4abfcc7315ce51')
 
     depends_on('py-setuptools', type='build')
-    depends_on('python@2.7:2.8,3.3:')
+    depends_on('python@2.7:2.8,3.3:', type=('build', 'run'))
     depends_on('py-notebook@4.2.0:', type=('build', 'run'))
+    depends_on('py-notebook@4.4.1:', type=('build', 'run'), when='@3.3.0:')