Update dependencies and Node.js requirement.

- **BREAKING**: Remove Node.js 12 testing and support due to
  `ky-universal` use of top-level `await`. The core code should still
  otherwise function with older Node.js releases in this release but a
  custom document loader may be needed.
- Update to `@digitalbazaar/http-client@3.1.0`.
  - Remove code to deal with accessing `response.data`.

Author: davidlehn

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [14.x, 16.x]
     steps:
     - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}

CHANGELOG.md

@@ -1,8 +1,15 @@
 # jsonld ChangeLog
 
-## 5.3.0 - 2022-xx-xx
+## 6.0.0 - 2022-xx-xx
 
 ### Changed
+- **BREAKING**: Drop testing and support for Node.js 12.x. The majority of the
+  code will still run on Node.js 12.x. However, the
+  `@digitalbazaar/http-client@3` update uses a newer `ky-universal` which uses
+  a top-level `await` that is unsupported in older Node.js versions. That
+  causes the included `node` `documentLoader` to not function and tests to
+  fail. If you wish to still use earlier Node.js versions, you may still be
+  able to do so with your own custom `documentLoader`.
 - Update to `@digitalbazaar/http-client@3`:
   - Pulls in newer `ky` and `ky-universal` that should address security alerts
     and provide other improvements.

lib/documentLoaders/node.js

@@ -181,13 +181,7 @@ async function _fetch({url, headers, strictSSL, httpAgent, httpsAgent}) {
       }
     }
     const res = await httpClient.get(url, options);
-    // @digitalbazaar/http-client may use node-fetch, which can output
-    // a warning if response.data is accessed and no json was parsed.
-    // Used here is the same type detection logic so the data field is
-    // accessed only if the client likely tried to parse JSON.
-    const contentType = res.headers.get('content-type');
-    const hasJson = contentType && contentType.includes('json');
-    return {res, body: hasJson ? res.data : null};
+    return {res, body: res.data};
   } catch(e) {
     // HTTP errors have a response in them
     // ky considers redirects HTTP errors

package.json

@@ -29,7 +29,7 @@
     "lib/**/*.js"
   ],
   "dependencies": {
-    "@digitalbazaar/http-client": "^3.0.1",
+    "@digitalbazaar/http-client": "^3.1.0",
     "canonicalize": "^1.0.1",
     "lru-cache": "^6.0.0",
     "rdf-canonize": "^3.0.0"
@@ -78,7 +78,7 @@
     "webpack-merge": "^5.7.3"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=14"
   },
   "keywords": [
     "JSON",