Updated to PixiJS v5.

package.json

@@ -27,9 +27,9 @@
     "author": "",
     "license": "LGPL-3.0-or-later",
     "devDependencies": {
-        "@pixi/jsdoc-template": "^2.4.2",
-        "eslint": "^6.1.0",
-        "eslint-config-prettier": "^6.0.0",
+        "@pixi/jsdoc-template": "^2.4.3",
+        "eslint": "^6.3.0",
+        "eslint-config-prettier": "^6.2.0",
         "eslint-plugin-prettier": "^3.1.0",
         "fs-extra": "^8.0.1",
         "gulp": "^4.0.2",
@@ -48,11 +48,13 @@
         "gsap": "^2.1.3",
         "hammerjs": "^2.0.8",
         "optimal-select": "^4.0.1",
-        "pixi-compressed-textures": "^1.1.8",
-        "pixi-filters": "^2.7.1",
+        "pixi-compressed-textures": "^2.0.0",
+        "pixi-ease": "^2.4.0",
+        "pixi-filters": "^3.0.3",
         "pixi-particles": "^4.1.1",
-        "pixi-projection": "^0.2.8",
-        "pixi.js": "^4.8.8",
+        "pixi-projection": "^0.3.5",
+        "pixi-viewport": "^4.2.2",
+        "pixi.js": "^5.1.3",
         "propagating-hammerjs": "^1.4.7"
     }
 }