Add dotenv dependency in development group

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Repository#sparql_query: add support for big queries + add specs

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Bump version

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Merge branch 'post-query' into develop
Remove Gemfile.lock

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>