Run CI in an OTP versions matrix

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ concurrency:
 
 jobs:
   ci:
-    name: CI
+    name: OTP-27
 
     runs-on: ubuntu-24.04
 
@@ -59,3 +59,52 @@ jobs:
           rebar3 unlock --all
           rebar3 upgrade --all
           git diff --exit-code
+
+  polyfill-ci:
+    name: OTP-${{matrix.otp-version}}
+
+    runs-on: ${{matrix.os}}
+
+    strategy:
+      matrix:
+        otp-version: [24, 25, 26]
+        os: [ubuntu-24.04]
+
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+
+      - uses: erlef/setup-beam@b9c58b0450cd832ccdb3c17cc156a47065d2114f # v1.18.1
+        id: setup-beam
+        with:
+          otp-version: ${{matrix.otp-version}}
+          rebar3-version: 3.23.0
+
+      - name: Restore _build
+        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        with:
+          path: _build
+          key: "_build-cache-for\
+                -os-${{runner.os}}\
+                -otp-${{steps.setup-beam.outputs.otp-version}}\
+                -rebar3-${{steps.setup-beam.outputs.rebar3-version}}\
+                -hash-${{hashFiles('rebar.lock')}}-${{hashFiles('rebar.config')}}"
+
+      - name: Restore rebar3's cache
+        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        with:
+          path: ~/.cache/rebar3
+          key: "rebar3-cache-for\
+                -os-${{runner.os}}\
+                -otp-${{steps.setup-beam.outputs.otp-version}}\
+                -rebar3-${{steps.setup-beam.outputs.rebar3-version}}\
+                -hash-${{hashFiles('rebar.lock')}}"
+
+      - name: Continuous Integration
+        run: |
+          rebar3 as polyfill, test ci
+
+      - name: Check if build left artifacts
+        run: |
+          rebar3 as polyfill unlock --all
+          rebar3 as polyfill upgrade --all
+          git diff --exit-code

rebar.config

@@ -94,6 +94,9 @@
         ]},
         {xref_checks, []}
     ]},
+    {polyfill, [
+        {deps, [{json_polyfill, "0.1.3"}]}
+    ]},
     {benchmark, [
         {deps, [
             {erlperf, "2.3.0"},