Trivial CI updates (#268)

* Update devdeps version for core dependencies and keep docs in sdist

* Fix ndcube github url

* Add astropy

Author: samaloney

MANIFEST.in

@@ -20,7 +20,7 @@ exclude tox.ini
 prune .github
 prune build
 prune changelog
-global-exclude *.pyc *.o
+
 # This subpackage is only used in development checkouts
 # and should not be included in built tarballs
 prune sunkit_spex/_dev

tox.ini

@@ -37,8 +37,15 @@ set_env =
 deps =
     # For packages which publish nightly wheels this will pull the latest nightly
     devdeps: numpy>=0.0.dev0
+    devdeps: matplotlib>=0.0.dev0
+    devdeps: scipy>=0.0.dev0
+    devdeps: xarray>0.0.dev0
+    devdeps: sunpy>0.0.dev0
+    devdeps: astropy>0.0dev0
     # Packages without nightly wheels will be built from source like this
-    # devdeps: git+https://github.com/ndcube/ndcube
+    devdeps: git+https://github.com/sunpy/ndcube
+    devdeps: git+https://github.com/Cadair/parfive
+    devdeps: git+https://github.com/spacetelescope/gwcs
     oldestdeps: minimum_dependencies
 # The following indicates which extras_require will be installed
 extras =