support new gitlab variable

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Mark version 0.39.0

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Merge branch 'release/0.38.1' into release/0.38

Feature/support require override (#597)

Co-authored-by: Uilian Ries <uilianries@gmail.com>

Get 'pure_c' from environment variable CONAN_PURE_C (#587)

Co-authored-by: Dmitriy Vetutnev <d.vetutnev@gmail.com>

Bump minor version to 0.36

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Only deploy

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Merge branch 'develop' into release/0.35

Merge pull request #530 from conan-io/release/0.34.4

Support Conan 1.31.0

Merge pull request #527 from conan-io/release/0.34.3

Accept Conan 1.30