Updated dependencies.

package.json

@@ -28,13 +28,13 @@
     "license": "LGPL-3.0-or-later",
     "devDependencies": {
         "@pixi/jsdoc-template": "^2.4.3",
-        "eslint": "^6.5.1",
-        "eslint-config-prettier": "^6.4.0",
+        "eslint": "^6.6.0",
+        "eslint-config-prettier": "^6.5.0",
         "eslint-plugin-prettier": "^3.1.1",
         "fs-extra": "^8.0.1",
         "gulp": "^4.0.2",
         "gulp-concat": "^2.6.1",
-        "gulp-prettier": "^2.1.0",
+        "gulp-prettier": "^2.2.0",
         "gulp-rename": "^1.4.0",
         "gulp-replace": "^1.0.0",
         "gulp-uglify": "^3.0.2",
@@ -49,11 +49,11 @@
         "hammerjs": "^2.0.8",
         "optimal-select": "^4.0.1",
         "pixi-compressed-textures": "^2.0.3",
-        "pixi-ease": "^2.4.1",
+        "pixi-ease": "^2.4.2",
         "pixi-filters": "^3.0.3",
-        "pixi-particles": "^4.1.3",
+        "pixi-particles": "^4.2.0",
         "pixi-projection": "^0.3.5",
-        "pixi-viewport": "^4.3.1",
+        "pixi-viewport": "^4.3.3",
         "pixi.js": "^5.1.5",
         "propagating-hammerjs": "^1.4.7"
     }