npx ng update @angular/cli@11 --force

angular.json

@@ -43,7 +43,6 @@
               "optimization": true,
               "outputHashing": "all",
               "sourceMap": false,
-              "extractCss": true,
               "namedChunks": false,
               "aot": true,
               "extractLicenses": true,
@@ -146,7 +145,7 @@
       "prefix": "lib",
       "architect": {
         "build": {
-          "builder": "@angular-devkit/build-ng-packagr:build",
+          "builder": "@angular-devkit/build-angular:ng-packagr",
           "options": {
             "tsConfig": "projects/json2html/tsconfig.lib.json",
             "project": "projects/json2html/ng-package.json"

package.json

@@ -18,41 +18,40 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "~10.0.11",
-    "@angular/common": "~10.0.11",
-    "@angular/compiler": "~10.0.11",
-    "@angular/core": "~10.0.11",
-    "@angular/forms": "~10.0.11",
-    "@angular/platform-browser": "~10.0.11",
-    "@angular/platform-browser-dynamic": "~10.0.11",
-    "@angular/router": "~10.0.11",
+    "@angular/animations": "~11.2.14",
+    "@angular/common": "~11.2.14",
+    "@angular/compiler": "~11.2.14",
+    "@angular/core": "~11.2.14",
+    "@angular/forms": "~11.2.14",
+    "@angular/platform-browser": "~11.2.14",
+    "@angular/platform-browser-dynamic": "~11.2.14",
+    "@angular/router": "~11.2.14",
     "core-js": "^2.5.4",
     "rxjs": "~6.6.2",
     "tslib": "^2.0.0",
     "zone.js": "~0.10.2"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~0.1000.7",
-    "@angular-devkit/build-ng-packagr": "~0.1000.7",
-    "@angular/cli": "^10.2.4",
-    "@angular/compiler-cli": "~10.0.11",
-    "@angular/language-service": "~10.0.11",
-    "@types/jasmine": "~2.8.8",
+    "@angular-devkit/build-angular": "~0.1102.18",
+    "@angular/cli": "^11.2.18",
+    "@angular/compiler-cli": "~11.2.14",
+    "@angular/language-service": "~11.2.14",
+    "@types/jasmine": "~3.6.0",
     "@types/jasminewd2": "~2.0.3",
     "@types/node": "^12.11.1",
     "codelyzer": "^6.0.0",
-    "jasmine-core": "~3.5.0",
+    "jasmine-core": "~3.6.0",
     "jasmine-spec-reporter": "~5.0.0",
-    "karma": "~5.0.0",
+    "karma": "~6.3.16",
     "karma-chrome-launcher": "~3.1.0",
     "karma-coverage-istanbul-reporter": "~3.0.2",
-    "karma-jasmine": "~3.3.0",
+    "karma-jasmine": "~4.0.0",
     "karma-jasmine-html-reporter": "^1.5.0",
-    "ng-packagr": "^10.0.0",
+    "ng-packagr": "^11.2.4",
     "protractor": "~7.0.0",
     "ts-node": "~7.0.0",
     "tslint": "~6.1.0",
-    "typescript": "~3.9.7"
+    "typescript": "~4.1.6"
   },
   "keywords": [
     "typescript",

projects/json2html/tsconfig.lib.json

@@ -2,6 +2,7 @@
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
     "outDir": "../../out-tsc/lib",
+    "declarationMap": true,
     "target": "es2015",
     "module": "es2015",
     "moduleResolution": "node",

projects/json2html/tsconfig.lib.prod.json

 {
   "extends": "./tsconfig.lib.json",
+  "compilerOptions": {
+    "declarationMap": false
+  },
   "angularCompilerOptions": {
     "enableIvy": false
   }

[Zéfling]

The installed Angular CLI version is outdated.
Installing a temporary Angular CLI versioned 11.2.18 to perform the update.
Installing packages for tooling via npm.
Installed packages for tooling via npm.
Using package manager: 'npm'
Collecting installed dependencies...
Found 33 dependencies.
Fetching dependency metadata from registry...
    Updating package.json with dependency @angular-devkit/build-angular @ "0.1102.18" (was "0.1000.7")...
    Updating package.json with dependency @angular/cli @ "11.2.18" (was "10.2.4")...
    Updating package.json with dependency @angular/compiler-cli @ "11.2.14" (was "10.0.11")...
    Updating package.json with dependency @angular/language-service @ "11.2.14" (was "10.0.11")...
    Updating package.json with dependency karma @ "6.3.16" (was "5.0.9")...
    Updating package.json with dependency ng-packagr @ "11.2.4" (was "10.0.4")...
    Updating package.json with dependency typescript @ "4.1.6" (was "3.9.7")...
    Updating package.json with dependency @angular/animations @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/common @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/compiler @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/core @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/forms @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/platform-browser @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/platform-browser-dynamic @ "11.2.14" (was "10.0.14")...
    Updating package.json with dependency @angular/router @ "11.2.14" (was "10.0.14")...
  UPDATE package.json (1742 bytes)
✔ Packages installed successfully.
** Executing migrations of package '@angular/cli' **

▸ Replace deprecated library builder '@angular-devkit/build-ng-packagr'.
  UPDATE angular.json (5371 bytes)
  UPDATE package.json (1690 bytes)
  Migration completed.

▸ Add 'declarationMap' compiler options for non production library builds.
  UPDATE projects/json2html/tsconfig.lib.prod.json (152 bytes)
  UPDATE projects/json2html/tsconfig.lib.json (719 bytes)
  Migration completed.

▸ Remove deprecated options from 'angular.json' that are no longer present in v11.
  UPDATE angular.json (5337 bytes)
  Migration completed.

▸ Update workspace dependencies to match a new v11 project.
  UPDATE package.json (1690 bytes)
✔ Packages installed successfully.
  Migration completed.

An unhandled exception occurred: Cannot find module '@angular-devkit/core'
Require stack:
- /home/zefling/Documents/Git/json2html-demo/node_modules/@angular/core/schematics/utils/project_tsconfig_paths.js
- /home/zefling/Documents/Git/json2html-demo/node_modules/@angular/core/schematics/migrations/missing-injectable/index.js
See "/tmp/ng-FFHx9Q/angular-errors.log" for further details.