Name and Update Comment options (vebr#11)

* Name and Update Comment options

- Adds the ability to specifiy a name to add into the title. Good for
  monorepos or multiple workflows where you want to differentiate runs
- Adds the ability to update a comment instead of creating a new one
- Update dependencies

* Update README.md

* Update README.md

* Skip and log if event is not a pull request

README.md

@@ -15,6 +15,10 @@ by another action already.
 Github token used for posting the comment. To use the key provided by the GitHub
 action runner, use `${{ secrets.GITHUB_TOKEN }}`.
 
+##### `name` (**Optional**)
+A name that will be included in the title of the comment. Good if you have multiple
+reports being run and want to differentiate them.
+
 ##### `lcov-file` (**Optional**)
 The location of the lcov file to read the coverage report from. Defaults to
 `./coverage/lcov.info`.
@@ -23,6 +27,11 @@ The location of the lcov file to read the coverage report from. Defaults to
 The location of the lcov file resulting from running the tests in the base
 branch. When this is set a diff of the coverage percentages is shown.
 
+##### `update-comment` (**Optional**)
+If `true` the comment left on the PR will be updated (if one exists) with the new report data
+instead of a new comment being created. If `false` every run will create a new comment on the PR
+with the new data and keep the previous comments. Defaults to `false`.
+
 ## Example usage
 
 ```yml

action.yml

@@ -8,12 +8,20 @@ inputs:
   github-token:
     description: Github token
     required: true
+  name:
+    description: Name of report
+    required: false
+    default: ""
   lcov-file:
     description: The location of the lcov.info file
     required: false
   lcov-base:
     description: The location of the lcov file for the base branch
     required: false
+  update-comment:
+    description: Update the existing comment if it exists instead of creating a new one
+    required: false
+    default: false
 runs:
   using: node12
   main: dist/main.js