Every day I am astonished by how helpful and clear composer error messages are...

Your requirements could not be resolved to an installable set of packages.

Problem 1
- The requested package whoami/whatami ~v4.1.55 exists as whoami/whatami[master, v0.1, v0.2-alpha, v0.3.0, v1.0.0, v1.0.1, v1.0.10, v1.0.11, v1.0.12, v1.0.13, v1.0.14, v1.0.15, v1.0.16, v1.0.17, v1.0.18, v1.0.19, v1.0.2, v1.0.20, v1.0.21, v1.0.22, v1.0.23, v1.0.24, v1.0.3, v1.0.4, v1.0.5, v1.0.6, v1.0.7, v1.0.8, v1.0.9, v1.1.0, v1.1.1, v1.1.2, v1.1.3, v1.1.4, v1.1.5, v1.1.6, v1.1.7, v1.1.8, v1.1.9, v1.2.0, v1.2.1, v1.2.2, v1.2.3, v1.2.4, v1.2.5, v1.2.6, v3.0.0, v3.0.1, v3.1.0, v3.1.1, v3.1.2, ... 100s more] but these are rejected by your constraint.

In laymans terms, couldn't find version ~v4.1.55.