ci: automate release process

[dirkdev98]

When a commit on 'main' contains the words 'prepare' and 'release' this job should run. It will get the new version out of the latest commit message and execute Lerna.
After that we expect Lerna to have pushed some tags and fill in the Github release with the changelog for that version.

[github-actions]

==== Benchmark result ====

Node.js version: 14
Total benchmarks: 15
          Passed: 15
          Failed: 0
-----------
router - github static path              200000  iterations    7241  ns/op
router - github path params              200000  iterations   10022  ns/op
compas validator simple                 5000000  iterations     238  ns/op
yup validator simple                     100000  iterations   11364  ns/op
fastest-validator validator simple     10000000  iterations     114  ns/op
compas validator nested                 1000000  iterations    1238  ns/op
yup validator nested                      50000  iterations   34195  ns/op
fastest-validator validator nested      2000000  iterations     517  ns/op
logger - strings                         500000  iterations    2602  ns/op
logger - objects                         500000  iterations    3290  ns/op
logger - deep objects                    500000  iterations    5813  ns/op
uuid                                    5000000  iterations     460  ns/op
uuid.isValid                           10000000  iterations     153  ns/op
isNil                                 500000000  iterations       0  ns/op
isPlainObject                         100000000  iterations      18  ns/op

[github-actions]

==== Benchmark result ====

Node.js version: 15
Total benchmarks: 15
          Passed: 15
          Failed: 0
-----------
router - github static path              200000  iterations    7821  ns/op
router - github path params              100000  iterations   10114  ns/op
compas validator simple                 5000000  iterations     254  ns/op
yup validator simple                     100000  iterations   12088  ns/op
fastest-validator validator simple     10000000  iterations     120  ns/op
compas validator nested                 1000000  iterations    1507  ns/op
yup validator nested                      50000  iterations   37824  ns/op
fastest-validator validator nested      2000000  iterations     543  ns/op
logger - strings                         500000  iterations    2526  ns/op
logger - objects                         500000  iterations    3113  ns/op
logger - deep objects                    500000  iterations    5357  ns/op
uuid                                    5000000  iterations     370  ns/op
uuid.isValid                           10000000  iterations     165  ns/op
isNil                                 500000000  iterations       0  ns/op
isPlainObject                         100000000  iterations      18  ns/op

[github-actions]

==== C8 test coverage ====
Statements: 66.18% ( 24423/36902 )
Branches : 65.44% ( 2683 /4100 )
Functions : 65.96% ( 810 /1228 )
Lines : 66.18% ( 24423 /36902 )