fix(requirements): fix read the docs compiling requirements error
@@ -9,5 +9,9 @@ sphinxcontrib-blockdiag>=1.5.5, <2.0.0
sphinxcontrib-seqdiag>=0.8.5, <2.0.0
sphinxcontrib-actdiag>=0.8.5, <2.0.0
sphinxcontrib-nwdiag>=0.9.5, <2.0.0
+blockdiag>=1.5.4, <2.0.0
+seqdiag>=0.9.6, <2.0.0
+actdiag>=0.5.4, <2.0.0
+nwdiag>=1.0.4, <2.0.0
recommonmark
future>=0.16.0 # for ../tools/gen_esp_err_to_name.py
