Fix cannot re-declare class ComposerAutoloaderInitXXX error

.travis.yml

@@ -67,6 +67,8 @@ before_install:
   - wp plugin install ./release/wp-cloudflare-guard.zip --force --activate --path=/tmp/wordpress
   # Export a dump of plugin-activated database to the _data folder
   - wp db export $TRAVIS_BUILD_DIR/tests/_data/dump.sql --path=/tmp/wordpress
+  # Clean to prevent cannot re-declare class ComposerAutoloaderInitXXX error.
+  - grunt post-build
 
 install:
   - travis_retry composer install --prefer-dist --no-suggest

Gruntfile.js

@@ -93,6 +93,12 @@ module.exports = function ( grunt ) {
 					'release/',
 					'vendor/'
 				]
+			},
+			"post-build": {
+				src: [
+					'build/',
+					'vendor/'
+				]
 			}
 		},
 
@@ -188,6 +194,7 @@ module.exports = function ( grunt ) {
 	grunt.registerTask( 'i18n', ['addtextdomain', 'makepot'] );
 	grunt.registerTask( 'pre-tag', ['version', 'i18n'] );
 	grunt.registerTask( 'pre-build', ['clean:pre-build'] );
+	grunt.registerTask( 'post-build', ['clean:post-build'] );
 	grunt.registerTask( 'build', ['copy:build', 'compress:build'] );
 
 	grunt.util.linefeed = '\n';

composer.json

@@ -61,7 +61,7 @@
 	},
 	"scripts": {
 		"build": [
-			"npm update",
+			"npm install",
 			"grunt pre-build",
 			"composer install --no-dev --prefer-dist --no-suggest",
 			"grunt build"
@@ -79,7 +79,7 @@
 			"phpcs --config-set installed_paths vendor/wp-coding-standards/wpcs"
 		],
 		"pre-autoload-dump": [
-			"npm update",
+			"npm install",
 			"cfwp build",
 			"grunt replace_namespaces"
 		],