eos-s3: Use Conda packages from LiteX-Hub channel

`quicklogic-vtr` had to stay at the same version because newer versions
failed at building `btn_counter` example with the current quicklogic
toolchain used.

Other packages are in the versions built from their latest source
commits.

Signed-off-by: Adam Jeliński <ajelinski@antmicro.com>

eos-s3/environment.yml

@@ -1,11 +1,11 @@
 name: eos-s3
 channels:
   - conda-forge
-  - quicklogic-corp/label/ql
+  - litex-hub
 dependencies:
-  - yosys=0.5_7972_g4045d484=20200817_053125
-  - yosys-plugins=1.2.0_0009_g9ab211c=20200817_053125
-  - vtr=v8.0.0_rc2_4003_g8980e4621=20200817_053125
+  - litex-hub::quicklogic-yosys=0.8.0_0021_g5eaf370c=20201120_145821
+  - litex-hub::quicklogic-yosys-plugins=1.2.0_0009_g9ab211c=20201120_145821
+  - litex-hub::quicklogic-vtr=v8.0.0.rc2_4003_g8980e4621=20200902_114536
   - make
   - lxml
   - simplejson