fix: Allow the option "force" to be used within a command only

Author: prantlf

README.md

@@ -236,6 +236,8 @@ Default value: false
 
 If set to `true`, it suppresses failures, which happened during taking snapshots. Instead of making the Grunt fail, the errors will be written only to the console.
 
+This option can be set for the whole task or within a single command object.
+
 ### Sub-tasks
 
 File names for snapshots can be used as sub-task names. Separate sub-tasks initialize separate instance of the webdriver:

tasks/html-dom-snapshot.js

@@ -458,6 +458,16 @@ module.exports = grunt => {
                 client, command, commandOptions, detected))
             }
           }), viewportSet)
+          .catch(error => {
+            const force = command.options && command.options.force
+            if (force) {
+              grunt.output.warn(error.stack)
+              grunt.log.warn(error)
+              grunt.log.warn('Ignoring the command execution failure.')
+            } else {
+              throw error
+            }
+          })
           .then(() => {
             if (file) {
               return makeSnapshotAndScreenshot()