Add filter to remove search weighting engine

.github/workflows/build-docs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
       with:
         path: 'wp-content/plugins/elasticpress'
 
@@ -52,7 +52,7 @@ jobs:
         wp cli-command-docs elasticpress --custom-order=index,activate-feature,deactivate-feature,list-features,get-algorithm-version,set-algorithm-version --remove=delete_transient_on_int,custom_get_transient --custom-intro='The following WP-CLI commands are supported by ElasticPress:' > wp-content/plugins/elasticpress/docs/wp-cli.md
 
     - name: Use Node.js 10
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: '10.x'
 
@@ -65,7 +65,7 @@ jobs:
         CI: true
 
     - name: Deploy to GH Pages
-      uses: maxheld83/ghpages@v0.2.1
+      uses: maxheld83/ghpages@v0.3.0
       env:
         BUILD_DIR: 'docs-built/'
         GH_PAT: ${{ secrets.GH_PAT }}

.github/workflows/push-asset-readme-update.yml

@@ -8,7 +8,7 @@ jobs:
     name: Push to master
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v2
     - name: WordPress.org plugin asset/readme update
       uses: 10up/action-wordpress-plugin-asset-update@stable
       env:

.github/workflows/push-deploy.yml

@@ -8,7 +8,7 @@ jobs:
     name: New tag
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v2
     - name: WordPress Plugin Deploy
       uses: 10up/action-wordpress-plugin-deploy@stable
       env:

includes/classes/Feature/Search/Weighting.php

@@ -22,6 +22,18 @@ class Weighting {
 	 * Sets up the weighting module
 	 */
 	public function setup() {
+		/**
+		 * Filter to disable loading of Search weighting engine.
+		 *
+		 * @hook ep_disable_search_weighting
+		 * @since 4.0
+		 * @param bool Whether to disable search weighting engine. Defaults to false.
+		 * @return bool Whether to disable search weighting engine.
+		 */
+		if ( apply_filters( 'ep_disable_search_weighting', false ) ) {
+			return;
+		}
+
 		add_action( 'admin_menu', [ $this, 'add_weighting_submenu_page' ], 15 );
 		add_action( 'admin_post_ep-weighting', [ $this, 'handle_save' ] );
 		add_filter( 'ep_formatted_args', [ $this, 'do_weighting' ], 20, 2 ); // After date decay, etc are injected