Changelog:
### Features
* Fix black complains (#1291)
* Fix master branch
* Rename sieve to conform naming convention
* Provide stack info in step pipeline units
* Provide stack info in pipeline sieves
* Add stack information in boots
* Fix complains of pre-commit (#1280)
* Introduce a step for removing scipy for TF>=2.1<2.3 releases (#1249)
* Add a link to Python version justification (#1273)
* Add a mechanism to skip packages from a stack based on pipeline steps
* Do not recommend using TensorFlow<2.3>=2.0 with NumPy>=1.19.0 (#1262)
* Prevent resolving TF<=1.14 with gast>0.2.2
* Implement a sieve that drops Pandas>=1.2 on Python 3.6 (#1264)
* Fix pre-commit issues reported (#1254)
* Fix formatting in backports
* Fix message printed
* Fix providing justification to CVE step
* Add justification links related to user stack scoring
* Add a step to make sure the correct version of NumPy is used for TF==1.13.1 (#1236)
* Link justification documents related to resolver messages (#1232)
* Fix wrong import
* Provide justification links to various parts of the resolution process
* Link justification for the approximating latest predictor
* Recommend TensorFlow release based on CUDA present in environment (#1225)
* Notify about proper usage of Intel's MKL
### Bug Fixes
* Do not accept CVEs when recommendation type is set to security
### Improvements
* Include pre-releases pipeline unit only if pre-releases are disabled (#1284)
* Turn warnings into errors reported when AICoE index cannot be parsed
* Add test for intel TensorFlow (#1231)
### Automatic Updates
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1299)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1297)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1296)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1295)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1294)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1289)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1278)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1277)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1276)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1274)
* :pushpin: Automatic update of dependency thoth-python from 0.10.1 to 0.10.2 (#1272)
* :pushpin: Automatic update of dependency hypothesis from 5.35.4 to 5.36.0 (#1271)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1270)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1269)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1267)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1265)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1259)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1258)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1257)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1256)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1255)
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0 (#1251)
* :pushpin: Automatic update of dependency thoth-storages from 0.25.10 to 0.25.11 (#1250)
* :pushpin: Automatic update of dependency hypothesis from 5.35.3 to 5.35.4
* :pushpin: Automatic update of dependency voluptuous from 0.11.7 to 0.12.0