fix(core): don't generate test related things in README when no unitTestRunner

Author: juristr

packages/workspace/src/schematics/library/files/lib/README.md

@@ -1,7 +1,10 @@
 # <%= name %>
 
 This library was generated with [Nx](https://nx.dev).
+<% if(hasUnitTestRunner) { %>
 
 ## Running unit tests
 
 Run `ng test <%= name %>` to execute the unit tests via [Jest](https://jestjs.io).
+
+<% } %>

packages/workspace/src/schematics/library/library.ts

@@ -74,7 +74,8 @@ function createFiles(options: NormalizedSchema): Rule {
  ...options,
  ...names(options.name),
  tmpl: '',
- offsetFromRoot: offsetFromRoot(options.projectRoot)
+ offsetFromRoot: offsetFromRoot(options.projectRoot),
+ hasUnitTestRunner: options.unitTestRunner !== 'none'
  }),
  move(options.projectRoot)
  ])