add proper tests to intervene

- remove/invert restriction on pandas which was fixed in 0.6.5 asntech/intervene#40 (comment)
- running the tool outputs deprection warnings for matplotlib >= 3.4 ..
so I added a version restriction

recipes/intervene/meta.yaml

@@ -8,7 +8,7 @@ source:
 
 build:
   noarch: python
-  number: 0
+  number: 1
   rpaths:
     - lib/R/lib/
     - lib/
@@ -22,8 +22,8 @@ requirements:
     - bedtools >=2.29.1
     - pysam >=0.15
     - pybedtools
-    - matplotlib-base
-    - pandas <1.0.0
+    - matplotlib-base <3.4
+    - pandas >=1.0.0
     - numpy
     - scipy
     - seaborn
@@ -45,6 +45,9 @@ test:
     - intervene.modules.venn
   commands:
     - intervene --help
+    - intervene pairwise --test
+    - intervene venn --test
+    - intervene upset --test
 
 about:
   home: https://github.com/asntech/intervene