Upgrade dependencies to their current versions

[echernyavskiy]

Some dependencies in their current versions conflict with roave/security-advisories, i.e.:

symfony/polyfill-php70 v1.1.0 requires paragonie/random_compat ~1.0 -> satisfiable by paragonie/random_compat[1.0.10, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, v1.0.0, v1.0.1, v1.2.0, v1.2.1, v1.2.2, v1.2.3, v1.3.0, v1.3.1, v1.4.0, v1.4.1, v1.4.2, v1.4.3].
symfony/polyfill-php70 v1.1.1 requires paragonie/random_compat ~1.0 -> satisfiable by paragonie/random_compat[1.0.10, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, v1.0.0, v1.0.1, v1.2.0, v1.2.1, v1.2.2, v1.2.3, v1.3.0, v1.3.1, v1.4.0, v1.4.1, v1.4.2, v1.4.3].
paragonie/random_compat 1.0.10 conflicts with roave/security-advisories[dev-master].
...

[coveralls]

Coverage increased (+15.3%) to 100.0% when pulling e70b9a7 on echernyavskiy:master into 2dc8752 on fisharebest:master.

[coveralls]

Coverage increased (+15.3%) to 100.0% when pulling e70b9a7 on echernyavskiy:master into 2dc8752 on fisharebest:master.

[coveralls]

Coverage increased (+15.3%) to 100.0% when pulling e70b9a7 on echernyavskiy:master into 2dc8752 on fisharebest:master.

[fisharebest]

Thanks!