update version to v1.17.0-beta.2

Fix linking shared libs with ldmd2 and gdmd

Improve cross-compilation support (replace `version` checks by BuildPlatform runtime checks) ...

Also fixes #1249. For LDC as implicit cross compiler, the file
extensions for libraries and object files etc. don't depend on the
compiler, but solely on the target. Targets selected with `--arch` are
correctly probed by dub, so that the parsed `BuildPlatform` represents
the target platform.

ldc2: Only use `-L--no-as-needed` for Linux *targets*

ldc2: Fix MSVC target detection for static libs ...

With --arch, the build (target) platform might now diverge from the host
platform. The compiler's default triple doesn't matter when
cross-compiling, so use the <name>.lib MSVC format when targeting Windows
but not MinGW.

This fixes one aspect of #1599.

Merge pull request #1756 from andre2007/fetch-sub-package ...

Support fetch sub-package

Enable specifying full target triples as --arch for ldc2 ...

By treating all 'architectures' containing a `-` as `-mtriple` values.
E.g., `dub --arch=wasm32-unknown-unknown-wasm` to cross-compile to
WebAssembly. This dub switch is already used when probing the compiler,
so the build platform detection works as expected.

Also add `wasm` as detected platform and use the .wasm executable file
extension (for ldc2).

This fixes #1749 when moving the `-mtriple` option from the dub config
file to the dub command line.

Support separate linking with ldc2 ...

This is basically #1548 with an augmented set of compiler flags being
included in the linking command lines.

Support fetch sub-package

Restrict extra ldc2 invocation for static libs to Windows hosts ...

Don't perform the does-default-target-triple-contain-msvc check on
non-Windows hosts (which would need a hacked LLVM to return true on
other hosts).

Support a few more ldc2 command-line options

Merge pull request #1754 from kinke/build_cmd ...

Revise build.cmd (remove curl.lib, add -O)
merged-on-behalf-of: Nicholas Wilson <thewilsonator@users.noreply.github.com>

Simplify build.sh: Drop obsolete libcurl specifics ...

According to the README, the min supported compiler version is v2.076.

Revise build.cmd (remove curl.lib, add -O) ...

-O is used in build.sh; the curl (import) library isn't required anymore
since Phobos v2.069.

Merge pull request #1753 from MartinNowak/merge_stable ...

Merge remote-tracking branch 'upstream/stable' into merge_stable

Merge remote-tracking branch 'upstream/stable' into merge_stable

update version to v1.17.0-beta.1

Merge remote-tracking branch 'upstream/master' into stable

Merge pull request #1733 from MartinNowak/merge_stable ...

Merge remote-tracking branch 'upstream/stable' into merge_stable

Merge pull request #1742 from andre2007/maven_search_packages ...

Enable exact search for maven registry provider

Enable exact search for maven registry provider

Merge pull request #1740 from andre2007/localsettingsfile ...

Project settings file
merged-on-behalf-of: Petar Kirov <ZombineDev@users.noreply.github.com>

Switch semaphore-ci to gdc-9

Project settings file

Fix return type

Missing import

Fixup return types and imports

Merge branch 'master' into sourceGlobbing

Merge remote-tracking branch 'upstream/stable' into merge_stable

update version to v1.16.0