API enhancements

[mmaelicke]

A few last API enhancements before version shift to 0.2

done:

• added version check on session creation (closes #32)

not yet (before accepting):

• test version check

[mmaelicke]

coverage diff hit has to be > 45

[codecov[bot]]

Codecov Report

Merging #56 into master will decrease coverage by 5.06%. The diff coverage is 59.45%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
- Coverage   47.44%   42.37%   -5.07%     
==========================================
  Files          48       39       -9     
  Lines        1720     1456     -264     
==========================================
- Hits          816      617     -199     
+ Misses        904      839      -65     

Flag	Coverage Δ
#e2e	42.37% <59.45%> (-5.07%)	:arrow_down:

Impacted Files	Coverage Δ
metacatalog/__init__.py	100.00% <ø> (ø)
metacatalog/db/session.py	18.03% <7.69%> (-2.38%)	:arrow_down:
metacatalog/db/migration.py	87.50% <87.50%> (ø)
metacatalog/models/datasource.py	43.93% <0.00%> (-0.35%)	:arrow_down:
metacatalog/test/test_pg_install.py
...embic/versions/121df083eedc_new_variables_added.py
metacatalog/test/_util.py
metacatalog/test/test_api_install.py
metacatalog/test/test_api_add_find.py
...versions/70fbbdebf581_add_description_to_detail.py
... and 11 more

---

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 ebd3b3b...5427717. Read the comment docs.

[mmaelicke]

migration-test added