fix typescript, test node 12 and package updates

.circleci/config.yml

@@ -56,6 +56,22 @@ jobs:
                       - ~/.npm
                   key: v1-dependencies-{{ checksum "_node_version" }}-{{ checksum "_npm_version" }}
             - run: npm run test.ci
+    test-node12:
+        docker:
+            - image: circleci/node:12
+        steps:
+            - checkout
+            - run: node --version > _node_version && npm --version > _npm_version && cat _node_version && cat _npm_version
+            - restore_cache:
+                  keys:
+                      - v1-dependencies-{{ checksum "_node_version" }}-{{ checksum "_npm_version" }}
+            - run: node --version && npm --version
+            - run: npm install
+            - save_cache:
+                  paths:
+                      - ~/.npm
+                  key: v1-dependencies-{{ checksum "_node_version" }}-{{ checksum "_npm_version" }}
+            - run: npm run test.ci
 
 workflows:
     version: 2
@@ -64,3 +80,4 @@ workflows:
             - test-node6
             - test-node8
             - test-node10
+            - test-node12

appveyor.yml

@@ -3,6 +3,9 @@ environment:
         - nodejs_version: '6'
         - nodejs_version: '8'
         - nodejs_version: '10'
+#       TODO: Uncomment and remove once appveyor supports node 12 https://github.com/appveyor/ci/issues/2921
+#        - nodejs_version: '12'
+
 install:
     - ps: Install-Product node $env:nodejs_version
     - set PATH=%APPDATA%\npm;%PATH%

package.json

@@ -49,34 +49,34 @@
     "webpack": "*"
   },
   "devDependencies": {
-    "@babel/cli": "^7.2.3",
-    "@babel/core": "^7.3.4",
-    "@babel/preset-env": "^7.3.4",
+    "@babel/cli": "^7.4.4",
+    "@babel/core": "^7.4.4",
+    "@babel/preset-env": "^7.4.4",
     "@babel/preset-typescript": "^7.3.3",
     "@chrisblossom/eslint-config": "^4.0.10",
-    "@types/jest": "^24.0.9",
-    "@types/node": "^11.10.4",
+    "@types/jest": "^24.0.12",
+    "@types/node": "^12.0.0",
     "@types/read-pkg-up": "^3.0.1",
-    "@types/webpack": "^4.4.25",
-    "babel-jest": "^24.1.0",
-    "babel-plugin-add-module-exports": "^1.0.0",
-    "codecov": "^3.2.0",
+    "babel-jest": "^24.8.0",
+    "babel-plugin-add-module-exports": "^1.0.2",
+    "codecov": "^3.3.0",
     "cross-env": "^5.2.0",
     "del-cli": "^1.1.0",
-    "eslint": "^5.15.0",
+    "eslint": "^5.16.0",
     "execa": "^1.0.0",
-    "husky": "^1.3.1",
-    "jest": "^24.1.0",
-    "lint-staged": "^8.1.5",
+    "husky": "^2.2.0",
+    "jest": "^24.8.0",
+    "lint-staged": "^8.1.6",
     "listr": "^0.14.3",
-    "prettier": "^1.16.4",
+    "prettier": "^1.17.0",
     "read-pkg-up": "^4.0.0",
-    "semver": "^5.6.0",
-    "temp-sandbox": "^1.0.17",
-    "typescript": "^3.3.3333",
-    "webpack": "^4.29.6"
+    "semver": "^6.0.0",
+    "temp-sandbox": "^2.0.0",
+    "typescript": "^3.4.5",
+    "webpack": "^4.30.0"
   },
   "dependencies": {
-    "del": "^4.0.0"
+    "@types/webpack": "^4.4.31",
+    "del": "^4.1.1"
   }
 }

src/clean-webpack-plugin.test.ts

@@ -1,6 +1,6 @@
-import { Configuration, Stats } from 'webpack';
 import path from 'path';
-import TempSandbox from 'temp-sandbox';
+import { Configuration, Stats } from 'webpack';
+import { TempSandbox } from 'temp-sandbox';
 import getWebpackVersion from '../dev-utils/get-webpack-version';
 
 const webpackVersion = getWebpackVersion();

src/clean-webpack-plugin.ts

@@ -1,6 +1,6 @@
-import { Compiler, Stats } from 'webpack';
 import path from 'path';
 import { sync as delSync } from 'del';
+import { Compiler, Stats } from 'webpack';
 
 interface Options {
     /**
@@ -229,7 +229,8 @@ class CleanWebpackPlugin {
         /**
          * Fetch Webpack's output asset files
          */
-        const assets = stats.toJson().assets.map((asset: { name: string }) => {
+        const assets = stats.toJson().assets || [];
+        const assetList = assets.map((asset: { name: string }) => {
             return asset.name;
         });
 
@@ -239,15 +240,15 @@ class CleanWebpackPlugin {
          * (relies on del's cwd: outputPath option)
          */
         const staleFiles = this.currentAssets.filter((previousAsset) => {
-            const assetCurrent = assets.includes(previousAsset) === false;
+            const assetCurrent = assetList.includes(previousAsset) === false;
 
             return assetCurrent;
         });
 
         /**
          * Save assets for next compilation
          */
-        this.currentAssets = assets.sort();
+        this.currentAssets = assetList.sort();
 
         const removePatterns = [];