gatsby-plugin-google-analytics has a syntax error

[tinder-kyleboss]

Description

Projects that use gatsby-plugin-google-analytics are noticing console errors. For example: #15280 (comment)

Steps to reproduce

1. Add gatsby-plugin-google-analytics to the project with yarn add gatsby-plugin-google-analytics as well as adding it to the plugins of gatsby-config.
2. gatsby build && gatsby serve.
3. Go to the page (e.g. localhost:9000) and observe the console.

Expected result

No syntax errors should exist.

Actual result

Environment

System:
  OS: macOS High Sierra 10.13.6
  CPU: (12) x64 Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz
  Shell: 3.2.57 - /bin/bash
Binaries:
  Node: 11.12.0 - ~/.nvm/versions/node/v11.12.0/bin/node
  Yarn: 1.15.2 - /usr/local/bin/yarn
  npm: 6.10.2 - ~/.nvm/versions/node/v11.12.0/bin/npm
Browsers:
  Chrome: 75.0.3770.142
  Firefox: 62.0.3
  Safari: 12.1.1
npmPackages:
  gatsby: ^2.0.59 => 2.4.2 
  gatsby-cli: ^2.7.21 => 2.7.21 
  gatsby-image: ^2.0.0 => 2.0.41 
  gatsby-plugin-catch-links: ^2.0.0 => 2.0.13 
  gatsby-plugin-eslint: ^2.0.1 => 2.0.5 
  gatsby-plugin-facebook-pixel: ^1.0.3 => 1.0.3 
  gatsby-plugin-feed: ^2.0.0 => 2.2.0 
  gatsby-plugin-google-analytics: ^2.0.6 => 2.0.19 
  gatsby-plugin-lodash: ^3.0.1 => 3.0.5 
  gatsby-plugin-manifest: 2.0.5 => 2.0.5 
  gatsby-plugin-node-fields: ^1.0.0 => 1.0.0 
  gatsby-plugin-react-helmet: ^3.0.0 => 3.0.12 
  gatsby-plugin-robots-txt: ^1.3.0 => 1.4.0 
  gatsby-plugin-sass: ^2.0.0 => 2.0.11 
  gatsby-plugin-sharp: 2.0.7 => 2.0.7 
  gatsby-plugin-sitemap: ^2.0.0 => 2.1.0 
  gatsby-plugin-styled-components: ^3.0.0 => 3.0.7 
  gatsby-plugin-twitter: ^2.0.0 => 2.0.13 
  gatsby-source-filesystem: ^2.0.1 => 2.0.33 
  gatsby-source-wordpress: ^3.0.0 => 3.0.58 
  gatsby-transformer-sharp: 2.1.4 => 2.1.4 

[reibus-ethanbellora]

I'm also experiencing the same issue, my google analytics account hasn't logged any activity since the error messages started displaying