fix moban.exceptions.NoThirdPartyEngine: jinja2

[PrajwalM2212]

Closes #121

Before raising the PR, here is a check list:

1. have you written unit tests for your code changes?
2. have you run "make format"?
3. are you requesting to "dev"?
4. have you updated the change log?
5. do you think that you can understand your changes after 6 month?
   5.1) can someone else understand your changes without your explanation?
6. are you pround of your code changes?
   6.1) do you have the feeling of achievement?

[PrajwalM2212]

Travis is failing due to

1. Formatting errors.
2. unicode was originally used for handlebars which is incompatible with python3

I will fix those when I am free.

[PrajwalM2212]

Working as usual

[codecov-io]

Codecov Report

Merging #123 into dev will increase coverage by 0.01%.
The diff coverage is 98.33%.

@@            Coverage Diff             @@
##              dev     #123      +/-   ##
==========================================
+ Coverage   98.55%   98.57%   +0.01%     
==========================================
  Files          37       37              
  Lines        1874     1891      +17     
==========================================
+ Hits         1847     1864      +17     
  Misses         27       27

Impacted Files	Coverage Δ
moban/base_engine.py	100% <ø> (ø)	⬆️
moban/engine_factory.py	93.42% <ø> (+0.01%)	⬆️
moban/mobanfile.py	100% <100%> (ø)	⬆️
moban/engine_handlebars.py	100% <100%> (ø)	⬆️
moban/main.py	100% <100%> (ø)	⬆️
tests/test_engine.py	100% <100%> (ø)	⬆️
moban/constants.py	100% <100%> (ø)	⬆️
moban/engine.py	98.97% <97.14%> (-1.03%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ae00754...471645a. Read the comment docs.

[chfw]

Will get these changes and I will improve a bit later.