[INTERNAL] Bump ava to 2.0.0

Relevant changelogs:
https://github.com/avajs/ava/releases/tag/v1.0.1
https://github.com/avajs/ava/releases/tag/v2.0.0

Relevant changes:
- AVA now requires at least Node.js 8.9.4. We require only 8.5.
  However, since this is a devDependency I guess we can live with that.
- t.throws() does not accept promises anymore. Use t.throwsAsync()
- Test titles now must be unique

Author: RandomByte

npm-shrinkwrap.json

@@ -52,7 +52,7 @@
 		"files": [
 			"test/lib/**/*.js"
 		],
-		"source": [
+		"sources": [
 			"lib/**/*.js",
 			"test/lib/**/*.js"
 		]
@@ -116,7 +116,7 @@
 		"yargs": "^13.2.4"
 	},
 	"devDependencies": {
-		"ava": "^0.25.0",
+		"ava": "^2.0.0",
 		"coveralls": "^3.0.4",
 		"cross-env": "^5.1.1",
 		"docdash": "^1.1.1",

package.json

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const path = require("path");
 const execa = require("execa");
 const pkg = require("../../../../package.json");

test/lib/cli/commands/base.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const build = require("../../../../lib/cli/commands/build");
 const normalizer = require("@ui5/project").normalizer;

test/lib/cli/commands/build.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const initCommand = require("../../../../lib/cli/commands/init");
 const fsHelper = require("../../../../lib/utils/fsHelper");

test/lib/cli/commands/init.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const normalizer = require("@ui5/project").normalizer;
 const serve = require("../../../../lib/cli/commands/serve");

test/lib/cli/commands/serve.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const normalizer = require("@ui5/project").normalizer;
 const tree = require("../../../../lib/cli/commands/tree");

test/lib/cli/commands/tree.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const versions = require("../../../../lib/cli/commands/versions");
 

test/lib/cli/commands/versions.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const baseMiddleware = require("../../../../lib/cli/middlewares/base");
 const logger = require("../../../../lib/cli/middlewares/logger");

test/lib/cli/middlewares/base.js

@@ -1,4 +1,4 @@
-const {test} = require("ava");
+const test = require("ava");
 const sinon = require("sinon");
 const loggerMiddleware = require("../../../../lib/cli/middlewares/logger");
 const logger = require("@ui5/logger");