Revert "support dependencies as git url with exact commit"

Support dependencies as git url with exact commit

Replace `hash_t` and `sizediff_t` with `size_t` and `ptrdiff_t`

Fix deprecation warnings/errors.

Rename Path to NativePath. ...

Matches the changes done in vibe.d 0.8.x and vibe-core.

Mark all methods of Dependency safe or trusted.

Optimize Dependency.merge. ...

Reduces the amount of version comparisons.

Optimize Dependency.toHash/matchesAny.

Let fuzzy version matches exclude pre-release variants of the bumped version. ...

This changes ~>1.2.3 to not match 1.3.0-beta.1 anymore as it currently does. To achieve this, ~>1.2.3 gets expanded to ">=1.2.3 <1.3.0-0", which filters out the smallest representable pre-release version of 1.3.0.

spelling fixes

Annotate Dependency/Version as safe.

trivial: Fix typos

Eliminate use of Json.opDispatch. ...

(cherry picked from commit bf65c40)

Let Dependency.toString() print if an optional dependency is marked as default.

Remove deprecated functionality to prepare for 1.0.0.

Use explicit types for static properties in Dependency/Version.

Deprecate Package.dependencies and .generateInfoString. ...

Adds getAllDependencies() as a semantically sound replacement.

Mention version of removal for all deprecated public symbols.

Avoid any of the newly deprecated symbols. ...

The only exception is the serialization code, which still iterates over deprecated fields, as well as Package.dependencies, which will be replaced in the next commit.

Review dub.dependency and improve documentation.

Fix test variable names.

Add "default" flag to Dependency and fix "*" to match optional dependencies.

Let Dependency.versionString output "~>" style version ranges.

remove dead code ...

- case where one of the versions is a branch is handled above

Make the describe() API strongly typed.

Add Dependency.versionSpec property.

Fix equality comparison of identical versions with different meta data.

Use booleans instead of strings to represent version range limits. ...

Also disallows specifying invalid version ranges as strings.

Fix limit conditions when merging dependency version ranges. ...

When merging a dependency ">=A <B" with a dependency that matches B exactly, the resulting dependency was ">=B <=B" instead of ">=B <B", thus erroneously matching B.

Apply patch by ketmar: remove comma expressions and fix property syntax. ...

Also contains two minor additional style fixes.