bumped some deps and removed two unwraps

[arkanoider]

Hi @grunch,

just updated some deps and compiled, seems ok apart that on win10 ( my work pc ) i had this error related to Openssl ( i supposed you introduced dep for cross compile ):

error: failed to run custom build command for `openssl-sys v0.9.102`

Caused by:
  process didn't exit successfully: `C:\Rust_prj\mostro\target\debug\build\openssl-sys-36a8d81941f24bd0\build-script-main` (exit code: 101)
  --- stdout
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_NO_VENDOR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_NO_VENDOR unset
  cargo:rerun-if-env-changed=OPENSSL_NO_VENDOR
  OPENSSL_NO_VENDOR unset
  running "perl" "./Configure" "--prefix=C:/Rust_prj/mostro/target/debug/build/openssl-sys-4bafe812c17faca5/out/openssl-build/install" "--openssldir=SYS$MANAGER:[OPENSSL]" "no-dso" "no-shared" "no-ssl3" "no-tests" "no-comp" "no-zlib" "no-zlib-dynamic" "--libdir=lib" "no-md2" "no-rc5" "no-weak-ssl-ciphers" "no-camellia" "no-idea" "no-seed" "no-capieng" "no-asm" "VC-WIN64A"

Maybe someone else can try to reprduce on windows?

[grunch]

LGTM