SRU micro to 2.0.1-1ubuntu0.1

[Raman Sarda]

[Impact]
Micro currently has the following issues in focal:

1.
 * Creates a log.txt file in whichever directory it is opened.
 * Crashes if open in directories which don't have write permissions for
   the user. e.g: running
   micro /opt/testfile.txt to even read that file crashes it.

2.
 * Micro thinks it's version is 0.0.0-unknown.

[Test Case]

1.
 * open any file using micro from terminal. A log.txt will be created in
   that folder.

 * Micro will crash giving an error saying:
   "error opening file: open log.txt: permission denied"

   If the user calling micro doesn't have write access to the folder of
   said file.

2.
 * micro --version gives the output as:
   Version: 0.0.0-unknown

[Where problems could occur]
The updated version 2.0.6-2 present in groovy fixes these issues. But

 * micro 2.0.6-2 will FTBFS if golang-github-zyedidia-tcell-dev isn't
   equal or above 1.4.8. Some important classes and methods which are
   updated are required. Which means the package
   golang-github-zyedidia-tcell also needs to be updated in focal. The
   relevant SRU bug for the same can be found here:
   https://bugs.launchpad.net/ubuntu/+source/golang-github-zyedidia-tcell/+bug/1908141

* micro 2.0.6-2 might also FTBFS in focal as the
  debhelper-compat required version is 13 and focal has only 12. So it
  will need to be modified accordingly. Thus, the version of micro in
  focal will be 2.0.1-1ubuntu0.1 after the SRU. but the contents will be
  same as 2.0.6-2 from groocy.

[Other Info]

 * Upstream bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=952283
 * Upstream bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953400