Commits on Jul 23, 2018

1. Specify node dependency using caret notation …

   This fixes an issue when deploying to CloudFoundry instances (such as GOV.UK PaaS) where the buildpack fails on the semver range:
   
   ```
      -----> Nodejs Buildpack version 1.6.28
      -----> Installing binaries
             engines.node (package.json): >=8.9.1 <9.0
             engines.npm (package.json): unspecified (use default)
             **WARNING** Dangerous semver range (>) in engines.node. See: http://docs.cloudfoundry.org/buildpacks/node/node-tips.html
             **ERROR** Unable to install node: improper constraint: >=8.9.1 <9.0
      Failed to compile droplet: Failed to run all supply scripts: exit status 14
   ```
   
   Using ^8.9.1 instead which is semantically equivalent (any version greater than 8.9.1 but less than 9.0) allows the app to deploy successfully:
   
   ```
      -----> Nodejs Buildpack version 1.6.28
      -----> Installing binaries
             engines.node (package.json): ^8.9.1
             engines.npm (package.json): unspecified (use default)
      -----> Installing node 8.11.3
             Download [https://buildpacks.cloudfoundry.org/dependencies/node/node-8.11.3-linux-x64-34b80d71.tgz]
   ```

   

   36degrees committed Jul 23, 2018
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2. Document in changelog

   

   36degrees committed Jul 23, 2018
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