cr version is less than released version

## Description

Following the instructions in README.md, the version from locally built binary is less than the current released version.

## Steps

1. Run through build instructions

```bash
git clone https://github.com/helm/chart-releaser
cd chart-releaser
go mod download
go install ./...
```

2. Get the version
```bash
go version
```

## Actual Results

The binary is installed at `$HOME/go/bin/cr` and when getting the version `cr version`:

```bash
Version: v0.2.3
Git commit: 5e239bd19fbefb9eb0181ecf0c7ef73b8fe2753c
Date: 2019-11-22T14:28:30Z
License: Apache 2.0
```

## Expected Results

The released version is v1.1.1, so expected that the version would be this or greater.