Removed fixed version requirements of dependencies

Signed-off-by: Maciej Kurc <mkurc@antmicro.com>
diff --git a/conf/environment.yml b/conf/environment.yml
index ee18da9..fcdf0c1 100644
--- a/conf/environment.yml
+++ b/conf/environment.yml
@@ -2,7 +2,7 @@
 channels:
   - symbiflow
 dependencies:
-  - symbiflow-yosys=0.8_6021_gd8b2d1a2=20200923_144930*
+  - symbiflow-yosys
   - pip:
     - tox
     - flake8
diff --git a/docs/environment.yml b/docs/environment.yml
index 9bf7d2e..2cf62d9 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -8,8 +8,8 @@
 - pycairo
 - pango
 - pygobject
-- symbiflow-yosys=0.8_6021_gd8b2d1a2=20200923_144930*
-- netlistsvg=0.0_0231_g67115bc=20200921_133616
+- symbiflow-yosys
+- netlistsvg
 # ReadTheDocs dependencies (installed here but also by the docs build CI)
 - mock
 - pillow
diff --git a/docs/requirements.txt b/docs/requirements.txt
index fb3652c..676c8ee 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-git+http://github.com/SymbiFlow/sphinx_materialdesign_theme.git@66f78b9#egg=sphinx_symbiflow_theme
+git+http://github.com/SymbiFlow/sphinx_materialdesign_theme.git@master#egg=sphinx_symbiflow_theme
 
 docutils
 sphinx-autobuild
@@ -8,13 +8,13 @@
 sphinxcontrib-napoleon
 
 # Markdown cross-reference solver library
-git+https://github.com/SymbiFlow/sphinxcontrib-markdown-symlinks.git@d912c75#egg=markdown_code_symlinks
+git+https://github.com/SymbiFlow/sphinxcontrib-markdown-symlinks.git@master#egg=markdown_code_symlinks
 
 # HDL diagrams using Yosys + netlistsvg
-git+https://github.com/SymbiFlow/sphinxcontrib-hdl-diagrams.git@4bdbf70#egg=sphinxcontrib-hdl-diagrams
+git+https://github.com/SymbiFlow/sphinxcontrib-hdl-diagrams.git@master#egg=sphinxcontrib-hdl-diagrams
 
 # Module diagrams
-git+https://github.com/SymbiFlow/symbolator.git@a9b24e4#egg=symbolator
+git+https://github.com/SymbiFlow/symbolator.git@master#egg=symbolator
 
 pycairo
 # vext.gi