setup: revert yadage dependency versions

Revert changes done in reanahub#333
to solve issues found in reanahub/reana-workflow-engine-yadage#219

setup.py

@@ -32,7 +32,7 @@ def get_snakemake_pkg(extras=""):
     "docs": ["Sphinx>=1.4.4", "sphinx-rtd-theme>=0.1.9",],
     "tests": tests_require,
     "kubernetes": ["kubernetes>=11.0.0,<12.0.0",],
-    "yadage": ["adage~=0.10.3", "yadage~=0.20.2", "yadage-schemas~=0.10.6"],
+    "yadage": ["adage~=0.10.1", "yadage~=0.20.1", "yadage-schemas~=0.10.6"],
     "snakemake": [get_snakemake_pkg()],
     "snakemake_reports": [get_snakemake_pkg("[reports]"), "pygraphviz<1.8"],
 }