feat: Drop node 13 (#288)

.changeset/polite-apricots-wink.md

@@ -0,0 +1,12 @@
+---
+"dom-accessibility-api": patch
+---
+
+Drop node 13 support
+
+We only stopped testing. Probability of breakage should be very low.
+
+**New policy**:
+
+> Only [active node versions](https://nodejs.org/en/about/releases/) are supported.
+> Inactive node versions can stop working in a SemVer MINOR release.

README.md

@@ -23,6 +23,9 @@ your eye please open an issue.
 
 ## Supported environments
 
+WARNING: Only [active node versions](https://nodejs.org/en/about/releases/) are supported.
+Inactive node versions can stop working in a SemVer MINOR release.
+
 ```bash
 ie 11
 edge >= 14

azure-pipelines.yml

@@ -21,12 +21,12 @@ strategy:
     # EOL: 	2022-04-30
     node_12_x:
       node_version: 12.x
-    # EOL: 2020-06-01
-    node_13_x:
-      node_version: 13.x
     # EOL: 2023-04-30
     node_14_x:
       node_version: 14.x
+    # Release: 2020-10-21
+    # node_15_x:
+    #   node_version: 15.x
 
 steps:
   - task: NodeTool@0
@@ -96,8 +96,8 @@ steps:
     displayName: "ES modules in node smoke tests of build"
     workingDirectory: tests/build/fixtures/node-es-modules
     # in node 12 we need to use a flag and I'm too lazy to branch even further
-    # running in node >= 13 is hopefully a sufficient smoke test
-    condition: or(startsWith(variables['node_version'], '13.'), startsWith(variables['node_version'], '14.'))
+    # not running in node < 13 is hopefully a sufficient smoke test
+    condition: not(or(startsWith(variables['node_version'], '10.'), startsWith(variables['node_version'], '12.')))
 
   - script: yarn test:ci
     displayName: "Run jest tests"