env-logger 0.9 to 0.10

./dev/list-rdeps output :

Versions of rdeps of rust-env-logger in unstable, that also exist in testing:
  librust-bindgen+env-logger-dev                   0.60.1-2+b2      depends on     librust-env-logger-0.9+default-dev, 
  librust-cargo-dev                                0.66.0-2         depends on     librust-env-logger-0.9+default-dev, 
  librust-debcargo-dev                             2.6.0-2+b1       depends on     librust-env-logger-0.9+default-dev, 
  librust-env-logger+default-dev                   0.9.3-1          depends on     librust-env-logger+termcolor-dev (= 0.9.3-1), librust-env-logger+atty-dev (= 0.9.3-1), librust-env-logger+humantime-dev (= 0.9.3-1), librust-env-logger+regex-dev (= 0.9.3-1), 
  librust-erbium-core-dev                          1.0.5-1          depends on     librust-env-logger-0.9+default-dev, 
  librust-parsec-service-dev                       1.2.0-1+b1       depends on     librust-env-logger-0.9+default-dev, 
  librust-quickcheck+use-logging-dev               1.0.3-2          depends on     librust-env-logger-0.9-dev | librust-env-logger-0.8-dev (>= 0.8.2-~~), 
  librust-sniffglue-dev                            0.15.0-4         depends on     librust-env-logger-0.9+default-dev, 
  librust-stackdriver-logger-dev                   0.8.2-1+b1       depends on     librust-env-logger-0.9+atty-dev (>= 0.9.3-~~), librust-env-logger-0.9+humantime-dev (>= 0.9.3-~~), librust-env-logger-0.9+regex-dev (>= 0.9.3-~~), librust-env-logger-0.9+termcolor-dev (>= 0.9.3-~~), librust-env-logger-0.9-dev (>= 0.9.3-~~), 
librust-pretty-env-logger

TODO: check if all can be patched.