Another attempt to fix micromamba issues

Author: lukelbd

.travis.yml

@@ -24,10 +24,10 @@ before_install:
   - micromamba config set always_yes true
   - micromamba config set changeps1 false
   - micromamba config set show_channel_urls true
-  - eval "$(micromamba shell hook --shell=bash)"
 
 install:
   - micromamba env create --file ci/environment.yml
+  - eval "$(micromamba shell hook --shell=bash)"
   - micromamba activate proplot-dev
   - micromamba list
   - which micromamba