Add docs and tests for encode/databases

[tiangolo]

✨ Add docs and tests for encode/databases.

Related to #36 #37

[codecov]

Codecov Report

Merging #107 into master will decrease coverage by 40.57%.
The diff coverage is 7.84%.

@@             Coverage Diff             @@
##           master     #107       +/-   ##
===========================================
- Coverage     100%   59.42%   -40.58%     
===========================================
  Files         118      120        +2     
  Lines        2882     2933       +51     
===========================================
- Hits         2882     1743     -1139     
- Misses          0     1190     +1190

Impacted Files	Coverage Δ
...orial/test_async_sql_databases/test_tutorial001.py	10% <10%> (ø)
docs/src/async_sql_databases/tutorial001.py	6.45% <6.45%> (ø)
fastapi/encoders.py	13.63% <0%> (-86.37%)	⬇️
fastapi/openapi/utils.py	17.44% <0%> (-82.56%)	⬇️
...st_tutorial/test_request_files/test_tutorial001.py	27.9% <0%> (-72.1%)	⬇️
...ests/test_tutorial/test_events/test_tutorial002.py	30.76% <0%> (-69.24%)	⬇️
...ts/test_tutorial/test_security/test_tutorial003.py	32.5% <0%> (-67.5%)	⬇️
fastapi/security/utils.py	33.33% <0%> (-66.67%)	⬇️
...l/test_request_forms_and_files/test_tutorial001.py	35.71% <0%> (-64.29%)	⬇️
...ests/test_tutorial/test_events/test_tutorial001.py	36.36% <0%> (-63.64%)	⬇️
... and 104 more

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[codecov]

Codecov Report

Merging #107 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #107   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files         118    120    +2     
  Lines        2882   2933   +51     
=====================================
+ Hits         2882   2933   +51

Impacted Files	Coverage Δ
docs/src/async_sql_databases/tutorial001.py	100% <100%> (ø)
...orial/test_async_sql_databases/test_tutorial001.py	100% <100%> (ø)

---

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 5a6e47b...a4ea82a. Read the comment docs.