How to update WP-CLI on Windows via Composer?

Apparently this isn't possible using only composer. Seems kind of silly for it to be a recommended way to install WP-CLI with no direct way to update it later. I ended up installing GIT and then doing a fresh install (e.g. git clone https://github.com/wp-cli/wp-cli.git d:\wp-cli) of wp-cli. Afterwards, issued a composer update --no-dev to install dependencies. Now in the future to update wp-cli I run git pull origin from d:\wp-cli followed by composer update --no-dev.

Let me know if this is wrong! :)

Edit--

So I realized that the above command was updating to the latest commit in the master branch. I couldn't find any automated way to always update to the latest branch so I wrote the following batch file. It queries all the tags from the wp-cli repo, iterates through them to find the latest one (because they are sorted alpha), then either clones or resets (if local repo already exists) to that tag. Then updates the dependencies via composer.

@echo off
SETLOCAL ENABLEDELAYEDEXPANSION
SET WPCLI_INSTALL_DRIVE=D:
SET WPCLI_INSTALL_DIR=WP-CLI
SET LATEST_WPCLI_MAJOR=-1
SET LATEST_WPCLI_MINOR=0
SET LATEST_WPCLI_REV=0
echo.
echo COMMIT_ID - TAG_NAME ^=^> VERSION_DETECTION [*] (* ^= Marked as latest)
for /f "tokens=1*" %%A in ('git ls-remote --tags https://github.com/wp-cli/wp-cli.git') do (
    SET "TAG_LINE=%%A"
    IF NOT "%%B"=="" (
        SET "TAG_LINE=!TAG_LINE! - %%B"
        for /f "tokens=2 delims=v" %%C in ("%%B") do (
            echo "%%C"|find /i ".">nul
            IF NOT ERRORLEVEL 1 (
                for /f "tokens=1-3 delims=." %%D in ("%%C") do (
                    SET "TAG_LINE=!TAG_LINE! ^=^> v%%D.%%E.%%F"
                    SET LATEST_WPCLI_FOUND=0

                    IF /I %%D GTR !LATEST_WPCLI_MAJOR! (
                        SET LATEST_WPCLI_FOUND=1
                    ) ELSE (
                        IF /I %%D GEQ !LATEST_WPCLI_MAJOR! (
                            IF /I %%E GTR !LATEST_WPCLI_MINOR! (
                                SET LATEST_WPCLI_FOUND=1
                            ) ELSE (
                                IF /I %%E GEQ !LATEST_WPCLI_MINOR! (
                                    IF /I %%F GTR !LATEST_WPCLI_REV! (
                                        SET LATEST_WPCLI_FOUND=1
                                    )
                                )
                            )
                        )
                    )

                    IF "!LATEST_WPCLI_FOUND!"=="1" (
                        SET "TAG_LINE=!TAG_LINE! *"
                        SET LATEST_WPCLI_MAJOR=%%D
                        SET LATEST_WPCLI_MINOR=%%E
                        SET LATEST_WPCLI_REV=%%F
                    )
                )
            )
        )
    )
    echo !TAG_LINE!
)

echo.
echo.

IF NOT "%LATEST_WPCLI_MAJOR%"=="-1" (
    echo Latest detected tag: v%LATEST_WPCLI_MAJOR%.%LATEST_WPCLI_MINOR%.%LATEST_WPCLI_REV%
    echo.
    IF EXIST "%WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%\bin\wp.bat" (
        echo Current WP-CLI Version:
        call "%WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%\bin\wp.bat" cli version
    ) ELSE (
        echo Current "%WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%\bin\wp.bat" not found to display current version.
    )
    echo.
    choice /m "Continue installing/updating?"
    IF ERRORLEVEL 2 exit /b 0

    IF EXIST "%WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%\.gitignore" (
        CHDIR /D "%WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%"
        git reset --hard "v%LATEST_WPCLI_MAJOR%.%LATEST_WPCLI_MINOR%.%LATEST_WPCLI_REV%"
    ) ELSE (
        git clone --branch "v%LATEST_WPCLI_MAJOR%.%LATEST_WPCLI_MINOR%.%LATEST_WPCLI_REV%" https://github.com/wp-cli/wp-cli.git %WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%
        CHDIR /D "%WPCLI_INSTALL_DRIVE%\%WPCLI_INSTALL_DIR%"
    )
    IF EXIST "composer.json" call composer update --no-dev
) ELSE (
    echo Latest version not found.
)
pause

You need to remove composer.lock before running composer update. composer.lock locks your Composer project to a specific hash.