* **Dependency pinning**

* Adds a new flag called `--pin` which creates a `luarocks.lock`

when building a rock with `luarocks build` or `luarocks make`.

This lock file contains the exact version numbers of every

direct or indirect dependency of the rock (in other words,

it is the transitive closure of the dependencies.)

For `make`, the `luarocks.lock` file is created in the current

directory.

The lock file is also installed as part of the rock in

its metadata directory alongside its rockspec.

When using `--pin`, if a lock file already exists, it is

ignored and overwritten.

* When building a rock with `luarocks make`, if there is a

`luarocks.lock` file in the current directory, the exact

versions specified there will be used for resolving dependencies.

* When building a rock with `luarocks build`, if there is a

`luarocks.lock` file in root of its sources, the exact

versions specified there will be used for resolving dependencies.

* When installing a `.rock` file with `luarocks install`, if the

rock contains a `luarocks.lock` file (i.e., if its dependencies

were pinned with `--pin` when the rock was built), the exact

versions specified there will be used for resolving dependencies.

* Improved VM type detection to support moonjit

* git: Support for shallow recommendations

* Initial support for Windows on ARM

* Support for building 64-bit Windows all-in-one binary

* More filesystem debugging output when using `--verbose` (now it

reports operations even when using LuaFileSystem-backed implementations)

* `--no-manifest` flag for creating a package without updating the

manifest files

* `--no-doc` flag is now supported by `luarocks make`

* Speed up dependency checks

* Speed up installation and deletion when deploying files

* build: do not download sources when when building with `--only-deps`

* New flag `--check-lua-versions`: when a rock name is not found, only

checks for availability in other Lua versions if this flag is given

* safer rollback on installation failure

* config: fix `--unset` flag

* Fix command name invocations with dashes (e.g. `luarocks-admin make-manifest`)

* Fix fallback to PATH search when Lua interpreter is not configured

* Windows: support usernames with spaces

* Windows: fix generation of temporary filenames (#1058)

* Windows: force `.lib` over `.dll` extension when resolving `LUALIB`