The option -Wliteral-suffix was introduced in gcc 4.8, and
"#pragma GCC diagnostic push" was added in 4.6. Using the header with an older
gcc would lead to warnings like:

string_view.hpp:438: warning: expected [error|warning|ignored] after '#pragma GCC diagnostic'
string_view.hpp:439: warning: unknown option after '#pragma GCC diagnostic' kind
string_view.hpp:1681: warning: expected [error|warning|ignored] after '#pragma GCC diagnostic'

martinmoene/nonstd-lite-project#56

…xpr then (#54, thanks @DerDakon)

The build error is:

  string_view.hpp:859:5: error: body of constexpr function 'constexpr nonstd::sv_lite::basic_string_view<CharT, Traits>::size_type nonstd::sv_lite::basic_string_view<CharT, Traits>::find(nonstd::sv_lite::basic_string_view<CharT, Traits>, nonstd::sv_lite::basic_string_view<CharT, Traits>::size_type) const [with CharT = char; Traits = std::char_traits<char>; nonstd::sv_lite::basic_string_view<CharT, Traits>::size_type = unsigned int]' not a return-statement

martinmoene/nonstd-lite-project#68

…sue 69)

martinmoene/nonstd-lite-project#69

…ezel)

See <martinmoene/nonstd-lite-project#71>.

The tests are not running on Travis CI anymore, so there is no
point in keeping that stuff around.

[skip ci]

@oliverlee)

Allow to avoid constexpr with std::search() and select a local implementation for it for C++14 constexpr.

martinmoene/nonstd-lite-project#72

…Lavavej)