lesson-61: change uri to this.uri in deleteProject()

[kylehorton33]

In project-planner/components/SingleProject.vue, the fetch function is currently calling for uri where it should be calling for this.uri. This appears to be fixed in the next lesson branch (lesson-62)

deleteProject() {
      fetch(uri, { method: 'DELETE' })
        .then(() => this.$emit('delete', this.project.id))
        .catch(err => console.log(err))
    }

deleteProject() {
      fetch(this.uri, { method: 'DELETE' })
        .then(() => this.$emit('delete', this.project.id))
        .catch(err => console.log(err))
    }