[node] Work around a link error on macOS release builds (#8409)

include/mbgl/style/layers/custom_layer.hpp

@@ -65,9 +65,7 @@ public:
 };
 
 template <>
-inline bool Layer::is<CustomLayer>() const {
-    return type == Type::Custom;
-}
+bool Layer::is<CustomLayer>() const;
 
 } // namespace style
 } // namespace mbgl

platform/node/bitrise.yml

@@ -62,6 +62,6 @@ workflows:
             gem install xcpretty --no-rdoc --no-ri
             export BUILDTYPE=Release
             export PUBLISH=true
-            make node
+            make test-node
             ./platform/node/scripts/after_success.sh
     - slack: *slack

src/mbgl/style/layers/custom_layer.cpp

@@ -20,5 +20,10 @@ CustomLayer::CustomLayer(const Impl& other)
 
 CustomLayer::~CustomLayer() = default;
 
+template <>
+bool Layer::is<CustomLayer>() const {
+    return type == Type::Custom;
+}
+
 } // namespace style
 } // namespace mbgl