[Dev] update opam dependencies; fix Python for tests

See merge request frama-c/frama-c!2912

Fix/andre/test math oracles macos

See merge request frama-c/frama-c!2919

[logic] ensure gcc-10 will not play with utf8 chars when preprocessing

See merge request frama-c/frama-c!2913

[Tests] avoid oracle diffs with non-default TMPDIRs (namely macOS)

See merge request frama-c/frama-c!2918

[Aorai] avoid macOS issues with test oracles and Filename.get_temp_dir_name

See merge request frama-c/frama-c!2917

Fix/andre/fc script path2

See merge request frama-c/frama-c!2921

Fixes callgraph distributed files

See merge request frama-c/frama-c!2916

[eacsl] Fix E-ACSL source distribution

See merge request frama-c/frama-c!2914

- Include all C files
- Include dev oracles

Make MdR tests more robust against choice of pre-processor

[MdR] avoid duplicate invocations in SARIF

See merge request frama-c/frama-c!2906

[Dev] fix Dockerfiles (use stable debian:buster) and add 19.1 + 18.0

See merge request frama-c/frama-c!2910

[From] Fixes a crash when the main function has no body.

Closes #361

See merge request frama-c/frama-c!2908

[Eva] User manual: fixes the parameter names used in examples/parametrizing.

See merge request frama-c/frama-c!2907