cxx03 deprecation

[cmazakas]

Finally remove C++11 polyfills

We remove the dependency on Boost.Tuple but indirectly support it by secretly supporting any generic tuple-type so long as it mimics std::tuple.

The boostdep report before is:

Brief dependency report for unordered (sources on, tests off):

# Primary dependencies

assert
config
container_hash
core
move
mp11
predef
preprocessor
static_assert
throw_exception
tuple
type_traits

# Secondary dependencies

describe

with this change, we see:

Brief dependency report for unordered (sources on, tests off):

# Primary dependencies

assert
config
container_hash
core
mp11
predef
throw_exception

# Secondary dependencies

describe
type_traits
static_assert

In total, this only removes the following dependencies from the project:

• move
• preprocessor
• tuple

with the potential to eventually see both TypeTraits and StaticAssert removed in the future.

[codecov[bot]]

Codecov Report

Merging #215 (554ce65) into develop (6b65c8f) will decrease coverage by 0.02%. The diff coverage is 100.00%.

Additional details and impacted files

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[joaquintides]

Before I forget, libraries.json need be updated to "cxxstd": "11". It's a good opportunity to update the maintainers info, also.

[pdimov]

The maintainer info should be updated immediately; no need to wait for this branch. :-)