Can't install Transcoder plugin

Not sure whether I should be posting this here or as a Github issue, but when trying to install NY Studio’s Transcoder plugin, I get:

Composer output: Package "craftcms/vue-asset" listed for update is not installed. Ignoring.
Package "yiisoft/yii2-shell" listed for update is not installed. Ignoring.
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1

The requested package nystudio107/craft-seomatic (locked at 3.3.17, required as ^3.3.18) is satisfiable by nystudio107/craft-seomatic[3.3.17] but these conflict with your requirements or minimum-stability.

Running update with –no-dev does not mean require-dev is ignored, it
just means the packages will not be installed. If dev requirements are
blocking the update you have to resolve those problems.

composer.json looks like this:

{
  "require": {
    "barrelstrength/sprout-fields": "^3.8.3",
    "craftcms/cms": "^3.4.24",
    "craftcms/redactor": "^2.6.1",
    "dukt/analytics": "^4.0",
    "nystudio107/craft-seomatic": "3.3.18",
    "nystudio107/craft-typogrify": "^1.1",
    "ostark/craft-async-queue": "^1.3.3",
    "putyourlightson/craft-blitz": "^3.6.5",
    "topshelfcraft/wordsmith": "^3.2.0",
    "verbb/cp-nav": "^3.0.13.1",
    "verbb/field-manager": "^2.1.8",
    "vlucas/phpdotenv": "^2.4.0"
  },
  "autoload": {
    "psr-4": {
      "modules\": "modules/",
      "modules\exifReturn\": "modules/"
    }
  },
  "config": {
    "sort-packages": true,
    "optimize-autoloader": true,
    "platform": {
      "php": "7.0"
    }
  },
  "scripts": {
    "post-root-package-install": [
      "@php -r "file_exists('.env') || copy('.env.example', '.env');""
    ]
  },
  "repositories": [
    { "type": "composer", "url": "https://packagist.phpcomposer.com"}
  ]
}

Has anyone else had this problem and how did you resolve it?

    "nystudio107/craft-seomatic": "^3.3.0",