chore: drop Node 12 from engines

BREAKING CHANGE:

Node 12 is soon entering EOL.

Also:
- perf: remove regextra library to reduce dependencies (#865)
- chore: drop Node 12 and add Node 17 to Travis

Co-authored-by: Brett Zamir <brettz9@yahoo.com>

.travis.yml

@@ -2,9 +2,9 @@ os: linux
 dist: xenial
 language: node_js
 node_js:
-  - "12.22.0"
   - "14.17.0"
   - "16"
+  - "17"
 install:
   - npm install --legacy-peer-deps
 before_script: >

package.json

@@ -10,7 +10,6 @@
     "debug": "^4.3.4",
     "escape-string-regexp": "^4.0.0",
     "esquery": "^1.4.0",
-    "regextras": "^0.8.0",
     "semver": "^7.3.6",
     "spdx-expression-parse": "^3.0.1"
   },
@@ -48,7 +47,7 @@
     "typescript": "^4.6.3"
   },
   "engines": {
-    "node": "^12 || ^14 || ^16 || ^17"
+    "node": "^14 || ^16 || ^17"
   },
   "keywords": [
     "eslint",

src/rules/requireDescriptionCompleteSentence.js

@@ -1,7 +1,4 @@
 import escapeStringRegexp from 'escape-string-regexp';
-import {
-  RegExtras,
-} from 'regextras/dist/main-umd';
 import iterateJsdoc from '../iterateJsdoc';
 
 const otherDescriptiveTags = new Set([
@@ -25,12 +22,9 @@ const extractSentences = (text, abbreviationsRegex) => {
     // Remove custom abbreviations
     .replace(abbreviationsRegex, '');
 
-  const sentenceEndGrouping = /([.?!])(?:\s+|$)/u;
+  const sentenceEndGrouping = /([.?!])(?:\s+|$)/ug;
 
-  // eslint-disable-next-line unicorn/no-array-method-this-argument
-  const puncts = new RegExtras(sentenceEndGrouping).map(txt, (punct) => {
-    return punct;
-  });
+  const puncts = txt.matchAll(sentenceEndGrouping);
 
   return txt