update docs

README.md

@@ -29,6 +29,12 @@ Also read about:
 * [Options](https://marked.js.org/#/USING_ADVANCED.md)
 * [Extensibility](https://marked.js.org/#/USING_PRO.md)
 
+## Compatibility
+
+**Node.js:** Only [current and LTS](https://nodejs.org/en/about/releases/) Node.js versions are supported. End of life Node.js versions may become incompatible with Marked at any point in time.
+
+**Browser:** Not IE11 :)
+
 ## Installation
 
 **CLI:** `npm install -g marked`

docs/PUBLISHING.md

@@ -10,6 +10,6 @@ Marked uses [semantic-release](https://github.com/semantic-release/semantic-rele
 
 We follow [semantic versioning](https://semver.org) where the following sequence is true `[major].[minor].[patch]`:
 
-1. **Major:** There is at least one change to the public API or a break from the [CommonMark](https://spec.commonmark.org/current/) or [GFM](https://github.github.com/gfm/) spec.
+1. **Major:** There is at least one change to the public API or a break from the [CommonMark](https://spec.commonmark.org/current/) or [GFM](https://github.github.com/gfm/) spec. Only [current and LTS](https://nodejs.org/en/about/releases/) Node.js versions are supported at any point in time.  A drop in support for a Node.js version may not result in a semver major bump to Marked.
 2. **Minor:** There is at least one new feature added to the public API.
 3. **Patch:** Changes that move Marked closer to spec compliance or change a public API that does not break backwards compatibility.

package.json

@@ -83,6 +83,6 @@
     "preversion": "npm run build && (git diff --quiet || git commit -am build)"
   },
   "engines": {
-    "node": ">= 8.16.2"
+    "node": "^10 || ^12 || >=14"
   }
 }