[TASK] Raise various dependencies

Last round of dependency bumps raise min
versions. There is little reason to allow
lower verisons for those not-too-common
ones with first LTS realease, so
we declare them as minimum.

We skip enshrined/svg-sanitize due to
it's broken sec release, though.

firebase/php-jwt: new features, no reasons to stay low
guzzlehttp/guzzle: improved version constraints
nikic/php-parser: PHP fixes, no reason to stay low
phpdocumentor/type-resolver: minor raise, internal rewrite, have
                             it to find issues early
typo3fluid/fluid: minor bump, no reason to stay low

> composer req firebase/php-jwt:^6.4.0
> composer req --no-update firebase/php-jwt:^6.4.0 -d typo3/sysext/core
> composer req guzzlehttp/guzzle:^7.5.1
> composer req --no-update guzzlehttp/guzzle:^7.5.1 -d typo3/sysext/core
> composer req nikic/php-parser:^4.15.4
> composer req --no-update nikic/php-parser:^4.15.4 -d typo3/sysext/install
> composer req phpdocumentor/type-resolver:^1.7.1
> composer req...