Path: Remove unused isValidFilename private function

Path: Add missing else clause on version statement ...

This was wrong on many level:
- The missing `else` clause meant that the `enforce` clause was always there on Windows;
- The `enforce("Reason")` should have been `enforce(false, "Reason")`,
  as in its current form it would never fail and not serve its intended purpose;
- It was pushing at runtime something that was easily detected at CT;

PackageManager: Load packages lazily on dub build ...

A problem of the current design of dub is that all locations are scanned,
regardless of what action is being performed, often multiple times.
With this change, a regular `dub build` on a project with all dependencies
resolved will no longer loads all available package, which can substantially
speed up development.

Use getPackage instead of getBestPackage for resolved dependencies ...

getBestPackage is intended to find the highest local version matching a range.
Due to this, it has to eagerly load packages and iterate through them.
However, when loading a resolved dependency, we have an exact Version,
which is simply wrapped in a VersionRange, so we can call getPackage instead.

Document PackageManager.getBestPackage, deprecate Dependency overload ...

The Dependency overload is not needed, as calling getBestPackage
with an SCM / path dependency does not make sense.

Deprecate `PackageManager.refresh(true)`, only expose `refresh()` ...

It is not actually used, as all call sites but two use false as an argument.
The two calls using true are inside a constructor, meaning there will be no
pre-existing packages, so whether true or false is passed will have
the same effect / result.

Deprecate yet another dub.remove overload using force_remove

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

update version to v1.30.0-beta.1

Fix unittest for platform probe on Windows

sumtype: Fix unittest compatibility with v2.096

sumtype: Fix compatibility with v2.094

sumtype: Work around v2.095 ICE

sumtype: Work around bugs in return type inference

sumtype: Use non-packaged import for std.format ...

std.format was split into modules in v2.097, but we want to be compatible
with older versions of the frontend, so use the package as a whole.

sumtype/dyaml: Work around various compatibility issues with v2.097

dyaml: Fix unittest compatibility with v2.099

Do not use Phobos' sumtype, use dyaml's versioned one ...

So that we can compile with older versions of the frontend,
currently v2.097 instead of v2.098.

Return null instead of empty array

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

Fix zip symlink problem.

Dub: Deprecate changing the rootPath ...

It's an essential part of the setup, and too many properties are derived
from it that we don't want to let the library user the ability to mess with it.

Commandline: Use inheritance, not a boolean, to control Dub initialization ...

The boolean was a breach of abstraction, as it was introduced
for a single sub-command. Instead, use inheritance, which
allows to keep that logic compartimentalized to the subcommand itself.

update version to v1.30.1-beta.1

Copy all dynamicLib deps extra files for root packages with `none` targetType ...

To support 'framework' use cases - a dummy root package depending on a bunch
of dynamicLibs, where all extra files are to be copied to the output dir.

Copy extra files of (direct & indirect) dynamicLibrary deps to root package output dir only

Windows: Copy .lib files from DLL deps only ...

One aspect of issue #2377 - don't copy static libs. And only copy
import .lib & .exp if the dependee is a DLL too.

Use dscanner-config for `dub lint` ...

Keep all original commandline flags in case we want support them in
the future.

Fixes #1940

Support --temp-build also in `dub build` (#2428)

Fix package scanning order. ...

Packages registered using add-path need to come before cached packages.