feat(@schematics/schematics): generate packages with TypeScript 3.8

Author: clydin

packages/schematics/schematics/blank/project-files/package.json.template

@@ -15,7 +15,7 @@
   "dependencies": {
     "@angular-devkit/core": "^<%= coreVersion %>",
     "@angular-devkit/schematics": "^<%= schematicsVersion %>",
-    "typescript": "~3.7.4"
+    "typescript": "~3.8.2"
   },
   "devDependencies": {
     "@types/node": "^12.11.1",

packages/schematics/schematics/schematic/files/package.json

@@ -15,7 +15,7 @@
   "dependencies": {
     "@angular-devkit/core": "^<%= coreVersion %>",
     "@angular-devkit/schematics": "^<%= schematicsVersion %>",
-    "typescript": "~3.7.4"
+    "typescript": "~3.8.2"
   },
   "devDependencies": {
     "@types/node": "^12.11.1",