Add Jest to TypeScript (and update dependencies)

TypeScript/jest.config.ts

@@ -0,0 +1,13 @@
+import { pathsToModuleNameMapper } from  "ts-jest/utils";
+const { compilerOptions } = require("./tsconfig");
+
+export default {
+  roots: ['<rootDir>/app', '<rootDir>/test/jest'],
+  collectCoverage: true,
+  coverageDirectory: 'coverage',
+  coverageProvider: 'v8',
+  transform: {
+    '^.+\\.tsx?$': 'ts-jest',
+  },
+  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>/' } ),
+};