ci: bring back testing on alpine

Ref: #31

Signed-off-by: Robert Günzler <r@gnzler.io>

Author: robertgzr

.circleci/config.yml

@@ -208,15 +208,18 @@ jobs:
       - checkout
       - npm_install:
           os: << parameters.os >>
+      - when:
+          condition:
+            equal: [ "alpine", << parameters.os >> ]
+          steps:
+            - prepare:
+                os: << parameters.os >>
+            - run:
+                command: npm run build:test
       - test
 
 ## WORKFLOWS ##
 
-matrix: &matrix
-  matrix:
-    parameters:
-      os: [ debian, linux, macos, "win/default" ]
-
 workflows:
   postject:
     jobs:
@@ -225,8 +228,16 @@ workflows:
             parameters:
               os: [ linux, macos, "win/default" ]
       - build:
-          <<: *matrix
+          matrix:
+            parameters:
+              os: [ linux, macos, "win/default" ]
       - test:
-          <<: *matrix
+          matrix:
+            parameters:
+              os: [ macos, "win/default" ]
           requires: [ build-<< matrix.os >> ]
-
+      - test:
+          matrix:
+            parameters:
+              os: [ alpine, debian ]
+          requires: [ build-linux ]