feat(config/jest): disable diagnostics entirely when using ts-jest

See: 'https://kulshekhar.github.io/ts-jest/docs/getting-started/options/diagnostics#disablingenabling'

Author: jrolfs

src/config/jest.config.js

@@ -44,9 +44,7 @@ const jestConfig = {
               require.resolve(transformer),
               {
                 ...options,
-                diagnostics: {
-                  warnOnly: true,
-                },
+                diagnostics: false,
               },
             ],
           ],