dependencies: Upgrade nearly all JavaScript dependencies to latest.

Keep katex at 0.10.x, mini-css-extract-plugin at 0.6.x
(https://github.com/webpack-contrib/mini-css-extract-plugin/issues/417),
and typescript-eslint at 1.x for now.  Upgrade everything else.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

package.json

@@ -21,7 +21,7 @@
     "clean-css": "^4.2.1",
     "clipboard": "^2.0.4",
     "core-js": "^3.0.1",
-    "css-loader": "^2.1.1",
+    "css-loader": "^3.2.0",
     "emoji-datasource-google": "^4.0.4",
     "emoji-datasource-google-blob": "npm:emoji-datasource-google@^3.0.0",
     "emoji-datasource-twitter": "^4.0.4",
@@ -32,7 +32,7 @@
     "font-awesome": "^4.7.0",
     "handlebars": "^4.1.2",
     "handlebars-loader": "^1.7.1",
-    "i18next": "^3.4.4",
+    "i18next": "^17.0.16",
     "imports-loader": "^0.8.0",
     "jquery": "^3.4.1",
     "jquery-caret-plugin": "^1.5.2",
@@ -55,17 +55,17 @@
     "simplebar": "^4.1.0",
     "sortablejs": "^1.9.0",
     "sorttable": "^1.0.2",
-    "source-sans-pro": "^2.45.0",
+    "source-sans-pro": "^3.6.0",
     "spectrum-colorpicker": "^1.8.0",
-    "style-loader": "^0.23.1",
-    "terser-webpack-plugin": "^1.4.1",
+    "style-loader": "^1.0.0",
+    "terser-webpack-plugin": "^2.1.0",
     "to-markdown": "^3.1.0",
-    "ts-node": "^7.0.1",
+    "ts-node": "^8.4.1",
     "typescript": "^3.5.1",
     "underscore": "^1.9.1",
-    "webfonts-loader": "^4.4.0",
+    "webfonts-loader": "^5.0.0",
     "webpack": "^4.33.0",
-    "webpack-bundle-tracker": "^0.3.0",
+    "webpack-bundle-tracker": "^0.4.2-beta",
     "webpack-cli": "^3.3.2",
     "winchan": "^0.2.1",
     "xdate": "^0.8.2",
@@ -82,9 +82,9 @@
     "jsdom": "^15.1.1",
     "nyc": "^14.1.1",
     "phantomjs-prebuilt": "^2.1.16",
-    "stylelint": "^10.0.1",
+    "stylelint": "^11.0.0",
     "svgo": "^1.2.2",
-    "swagger-parser": "^6.0.5",
+    "swagger-parser": "^8.0.1",
     "vnu-jar": "^19.6.7",
     "webpack-dev-server": "^3.5.1",
     "yarn-deduplicate": "^1.1.1"

version.py

@@ -26,4 +26,4 @@ LATEST_RELEASE_ANNOUNCEMENT = "https://blog.zulip.org/2019/03/01/zulip-2-0-relea
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = '54.4'
+PROVISION_VERSION = '55.0'