Revert "temp: use busted from master [REVERT ME]"

This reverts commit 21eace9.

Author: Tieske

.github/workflows/unix_build.yml

@@ -24,8 +24,7 @@ jobs:
 
     - name: dependencies
       run: |
-        luarocks install busted --deps-only
-        luarocks install busted --dev
+        luarocks install busted
         luarocks install luacov-coveralls
 
     - name: build

appveyor.yml

@@ -22,8 +22,7 @@ before_build:
   - hererocks here --%LUA% -rlatest
   - call here\bin\activate
   - luarocks install luacov-coveralls
-  - luarocks install busted --deps-only
-  - luarocks install busted --dev
+  - luarocks install busted
 
 build_script:
   - luarocks remove penlight --force