libmodulemd 2.2.0 and 1.8.3

Aarushi Singh (1):

• Update test-modulemd-merger.c

Athira_Selvam (3):

• Copies some python test of modulestream into C
• Extends tests for ModuleStream.depends_on_stream()
• Copies nsvc,nsvca and dependencies tests

Neal Gompa (2):

• V2: Add missing include for string.h to modulemd-util.h
• Tests: Use /bin/bash for interpreter shebangs for shell scripts

Niharika Shrivastava (10):

• Fixes #189: Create Python tutorial: Getting the default stream for a module (#205)
• add c tutorial for default
• create modulemd_hash_table_equals()
• provide .equals() functionality for default objects
• add .equals() functionality for service_levels
• add .equals() functionality for profile
• add .equals() for buildopts
• remove warnings for explicit typecasting of GEqualFunc
• update readme for rpm api using nsvca
• add .equals() for dependencies

Nishka Dasgupta (1):

• Add tests for openSUSE Tumbleweed. Use the same tests as for CentOS.

Stephen Gallagher (42):

• Bump versions to 2.1.1dev and 1.8.3dev
• Fix documentation for ModuleStream.depends_on_stream()
• Tests: Add automatic pycodestyle checking
• Start splitting up tests by distribution
• Use python.find_installation() from meson 0.46+
• Add tests for CentOS 7
• Fix Coverity scan detection
• Update README for 2.x
• Add "Getting Started With Developing" to README
• Add Fedora 30 to automated tests
• Properly report CentOS test failures
• Fix dependencies in developer guide
• Split DNF commands in developer docs
• Add redhat-rpm-config to developer requirements
• Drop some deps from CentOS CI
• Check return value of g_hash_table_next
• Drop TODO in comment that's already done
• Fix incorrect variable in error message
• Move arch to ModuleStream parent class
• Add ModuleStream.get_NSVCA()
• Add Modulemd.Module.get_stream_by_NSVCA()
• Convert Modulemd.Module.add_stream() to use NSVCA
• Drop unused internal variable
• Merge pull request #227 from sgallagher/nsvca
• Add override_name for components
• Component: Use key where more appropriate
• Generate documentation in Travis
• README: Update documentation link
• Travis: Properly exit if unit tests fail
• travis.yml: Fix typo
• Component: Fix typo in documentation
• Component: Add buildafter
• Component: Add validation routine
• ModuleStream: Validate buildorder/buildafter
• ModuleIndex: add remove_module()
• Add modulemd_yaml_parse_bool()
• Add 'buildonly' option for components
• Update docker instructions
• Merge pull request #220 from NishkaDG/master
• Add Modulemd.RpmMapEntry
• Add rpm-map to ModuleStreamV2
• Bump version to 2.2.0