fix(preset, eslint): display short tag in release notes

closes #313

packages/conventional-changelog-eslint/templates/commit.hbs

@@ -1,5 +1,5 @@
 * {{#if message}}{{message}}{{else}}{{header}}{{/if}}
 
-{{~!-- commit hash --}} {{#if @root.linkReferences}}([{{hash}}]({{#if @root.host}}{{@root.host}}/{{/if}}{{#if @root.owner}}{{@root.owner}}/{{/if}}{{@root.repository}}/{{@root.commit}}/{{hash}})){{else}}{{hash~}}{{/if}}
+{{~!-- commit hash --}} {{#if @root.linkReferences}}([{{shortHash}}]({{#if @root.host}}{{@root.host}}/{{/if}}{{#if @root.owner}}{{@root.owner}}/{{/if}}{{@root.repository}}/{{@root.commit}}/{{hash}})){{else}}{{hash~}}{{/if}}
 
 {{~!-- commit references --}}{{#if references}}, closes{{~#each references}} {{#if @root.linkReferences}}[{{#if this.owner}}{{this.owner}}/{{/if}}{{this.repository}}#{{this.issue}}]({{#if @root.host}}{{@root.host}}/{{/if}}{{#if this.repository}}{{#if this.owner}}{{this.owner}}/{{/if}}{{this.repository}}{{else}}{{#if @root.owner}}{{@root.owner}}/{{/if}}{{@root.repository}}{{/if}}/{{@root.issue}}/{{this.issue}}){{else}}{{#if this.owner}}{{this.owner}}/{{/if}}{{this.repository}}#{{this.issue}}{{/if}}{{/each}}{{/if}}

packages/conventional-changelog-eslint/writer-opts.js

@@ -26,6 +26,8 @@ function getWriterOpts () {
         return
       }
 
+      commit.shortHash = commit.hash.substring(0, 7)
+
       return commit
     },
     groupBy: `tag`,