Remove support for Node.js 12, update unified-engine

Closes GH-45.

Reviewed-by: Titus Wormer <tituswormer@gmail.com>

* This mainly uses `yaml` to correctly support YAML 1.2
* The server now implements LSP 3.17 (which should be backwards compatible)

.github/workflows/main.yml

@@ -20,5 +20,5 @@ jobs:
           - ubuntu-latest
           - windows-latest
         node:
-          - lts/erbium
+          - lts/fermium
           - lts/gallium

lib/index.js

@@ -122,6 +122,7 @@ function vfileMessageToDiagnostic(message) {
   }
 
   if (message.expected) {
+    // type-coverage:ignore-next-line
     diagnostic.data = {
       expected: message.expected
     }
@@ -458,12 +459,13 @@ export function createUnifiedLanguageServer({
     }
 
     for (const diagnostic of event.context.diagnostics) {
-      const {data} = diagnostic
+      // type-coverage:ignore-next-line
+      const data = /** @type {{expected?: unknown[]}} */ (diagnostic.data)
       if (typeof data !== 'object' || !data) {
         continue
       }
 
-      const {expected} = /** @type {{expected?: unknown[]}} */ (data)
+      const {expected} = data
 
       if (!Array.isArray(expected)) {
         continue

package.json

@@ -35,11 +35,11 @@
   "dependencies": {
     "@types/unist": "^2.0.0",
     "find-up": "^6.0.0",
-    "load-plugin": "^4.0.0",
-    "unified-engine": "^9.0.0",
+    "load-plugin": "^5.0.0",
+    "unified-engine": "^10.0.0",
     "vfile": "^5.0.0",
     "vfile-message": "^3.0.0",
-    "vscode-languageserver": "^7.0.0",
+    "vscode-languageserver": "^8.0.0",
     "vscode-languageserver-textdocument": "^1.0.0"
   },
   "devDependencies": {
@@ -53,7 +53,7 @@
     "typescript": "^4.0.0",
     "unified": "^10.0.0",
     "vscode-languageserver-protocol": "^3.0.0",
-    "xo": "^0.48.0"
+    "xo": "^0.50.0"
   },
   "scripts": {
     "prepack": "npm run build",
@@ -72,7 +72,10 @@
     "trailingComma": "none"
   },
   "xo": {
-    "prettier": true
+    "prettier": true,
+    "rules": {
+      "capitalized-comments": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [

readme.md

@@ -56,7 +56,7 @@ various editors.
 ## Install
 
 This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).
-In Node.js (version 12.20+, 14.14+, or 16.0+), install with [npm][]:
+In Node.js (version 14.14+, or 16.0+), install with [npm][]:
 
 ```sh
 npm install unified-language-server
@@ -209,11 +209,11 @@ server features:
 
 Projects maintained by the unified collective are compatible with all maintained
 versions of Node.js.
-As of now, that is Node.js 12.20+, 14.14+, and 16.0+.
+As of now, that is Node.js 14.14+, and 16.0+.
 Our projects sometimes work with older versions, but this is not guaranteed.
 
 This project uses [`vscode-languageserver`][vscode-languageserver] 7, which
-implements language server protocol 3.16.0.
+implements language server protocol 3.17.0.
 It should work anywhere where LSP 3.6.0 or later is implemented.
 
 ## Related

test/index.js

@@ -245,7 +245,7 @@ test('uninstalled processor w/ `defaultProcessor`', async (t) => {
 
   t.deepEqual(
     cleanStack(log.message, 2).replace(/(imported from )[^\r\n]+/, '$1zzz'),
-    "Cannot find `xxx-missing-yyy` locally but using `defaultProcessor`, original error:\nError [ERR_MODULE_NOT_FOUND]: Cannot find package 'xxx-missing-yyy' imported from zzz",
+    "Cannot find `xxx-missing-yyy` locally but using `defaultProcessor`, original error:\nError: Cannot find package 'xxx-missing-yyy' imported from zzz",
     'should work w/ `defaultProcessor`'
   )
 })
@@ -679,10 +679,7 @@ test('`workspace/didChangeWorkspaceFolders`', async (t) => {
     workspaceFolders: [{uri: processCwd.href, name: ''}]
   })
 
-  await new Promise((resolve) => {
-    connection.onRequest('client/registerCapability', resolve)
-    connection.sendNotification('initialized', {})
-  })
+  connection.sendNotification('initialized', {})
 
   const otherCwd = new URL('folder/', processCwd)