Update npm modules and gulpfile

package.json

@@ -4,36 +4,36 @@
   "description": "Password generator for BIOS",
   "main": "decrypt_bios.js",
   "dependencies": {
-    "@types/jasmine": "^2.8.3",
+    "@types/jasmine": "^3.4.0",
     "@types/long": "^3.0.32",
     "gulp-jasmine": "^4.0.0",
     "long": "dcodeIO/long.js"
   },
   "devDependencies": {
-    "clean-webpack-plugin": "^0.1.19",
-    "copy-webpack-plugin": "^4.5.1",
-    "coveralls": "^3.0.0",
-    "del": "^3.0.0",
-    "gulp": "^3.9.1",
+    "clean-webpack-plugin": "^3.0.0",
+    "copy-webpack-plugin": "^5.0.4",
+    "coveralls": "^3.0.6",
+    "del": "^5.0.0",
+    "gulp": "^4.0.2",
     "gulp-istanbul": "^1.1.3",
     "gulp-sourcemaps": "^2.6.4",
     "gulp-tslint": "^8.1.3",
-    "gulp-typescript": "^4.0.2",
+    "gulp-typescript": "^5.0.1",
     "html-webpack-plugin": "^3.2.0",
     "istanbul": "^0.4.5",
-    "karma": "^2.0.2",
-    "karma-chrome-launcher": "^2.2.0",
-    "karma-firefox-launcher": "^1.1.0",
-    "karma-jasmine": "^1.1.1",
-    "karma-sauce-launcher": "^1.2.0",
+    "karma": "^4.2.0",
+    "karma-chrome-launcher": "^3.1.0",
+    "karma-firefox-launcher": "^1.2.0",
+    "karma-jasmine": "^2.0.1",
+    "karma-sauce-launcher": "^2.0.2",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^3.0.0",
-    "remap-istanbul": "^0.11.0",
-    "ts-loader": "^4.2.0",
-    "tslint": "^5.9.1",
-    "typescript": "^2.8.3",
-    "webpack": "^4.6.0",
-    "webpack-cli": "^2.0.15",
+    "karma-webpack": "^4.0.2",
+    "remap-istanbul": "^0.13.0",
+    "ts-loader": "^6.0.4",
+    "tslint": "^5.18.0",
+    "typescript": "^3.5.3",
+    "webpack": "^4.39.2",
+    "webpack-cli": "^3.3.6",
     "webpack-closure-compiler": "^2.1.6",
     "webpack-dev-server": "^3.1.3"
   },
@@ -41,6 +41,7 @@
     "test": "gulp test",
     "lint": "gulp lint",
     "cover": "gulp coverage",
+    "clean": "gulp clean",
     "browser-test": "karma start",
     "webpack": "webpack",
     "dev-server": "webpack-dev-server"