Jupyterlab-code-formatter

**Server extension**

- Trim trialing newline for autopep8;

**Jupyterlab extension**

No changes.

**Server extension**

- Fix bug where presence of `rpy2` could cause plugin to be useless;

**Jupyterlab extension**

No changes.

**Server extension**

- Support `styler` - Another R code formatter - courtesy of dev-wei;

**Jupyterlab extension**

- Support `styler` - Another R code formatter - courtesy of dev-wei;

**Server extension**

- Support `formatr` - A R code formatter - courtesy of dev-wei;

**Jupyterlab extension**

- Support `formatr` - A R code formatter - courtesy of dev-wei;

**General**

- Minor updates to README - courtesy of reza1615;

**Server extension**

No Change

**Jupyterlab extension**

- Support Jupyterlab ^1.0.0 - courtesy of gnestor;
- Remove custom_style enum restriction - courtesy of CaselIT;
- Add companion packages info;

Same as v0.2.2 - Re-publishing because I messed up the versioning.