Issue 870 - Update highlight.js, use standard css, add plaintext+julia syntax (#871)

Author: Marc-Andre-Rivet

CHANGELOG.md

@@ -2,6 +2,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+### Added
+- [#871](https://github.com/plotly/dash-core-components/pull/871) Add Julia syntax highlighting support for dcc.Markdown
+
 ## [1.12.1] - 2020-09-16
 ### Fixed
 - [#854](https://github.com/plotly/dash-core-components/pull/854) Used `persistenceTransforms` to strip the time part of the datetime in the persited props of DatePickerSingle (date) and DatePickerRange (end_date, start_date), fixing [dcc#700](https://github.com/plotly/dash-core-components/issues/700).

package-lock.json

@@ -42,7 +42,7 @@
   "dependencies": {
     "color": "^3.1.0",
     "fast-isnumeric": "^1.1.3",
-    "highlight.js": "^9.17.1",
+    "highlight.js": "^10.3.1",
     "moment": "^2.20.1",
     "plotly.js": "1.55.2",
     "prop-types": "^15.6.0",

package.json

@@ -1,12 +1,14 @@
-import highlightjs from 'highlight.js/lib/highlight';
-import '../components/css/highlight.css';
+import highlightjs from 'highlight.js/lib/core';
+import 'highlight.js/styles/github.css';
 
 import bash from 'highlight.js/lib/languages/bash';
 import css from 'highlight.js/lib/languages/css';
 import http from 'highlight.js/lib/languages/http';
 import javascript from 'highlight.js/lib/languages/javascript';
 import json from 'highlight.js/lib/languages/json';
+import julia from 'highlight.js/lib/languages/julia';
 import markdown from 'highlight.js/lib/languages/markdown';
+import plaintext from 'highlight.js/lib/languages/plaintext';
 import python from 'highlight.js/lib/languages/python';
 import r from 'highlight.js/lib/languages/r';
 import ruby from 'highlight.js/lib/languages/ruby';
@@ -20,7 +22,9 @@ highlightjs.registerLanguage('css', css);
 highlightjs.registerLanguage('http', http);
 highlightjs.registerLanguage('javascript', javascript);
 highlightjs.registerLanguage('json', json);
+highlightjs.registerLanguage('julia', julia);
 highlightjs.registerLanguage('markdown', markdown);
+highlightjs.registerLanguage('plaintext', plaintext);
 highlightjs.registerLanguage('python', python);
 highlightjs.registerLanguage('r', r);
 highlightjs.registerLanguage('ruby', ruby);