Release version 0.8.0 (#869)

Author: awvwgk

fpm.toml

@@ -1,5 +1,5 @@
 name = "fpm"
-version = "0.7.0"
+version = "0.8.0"
 license = "MIT"
 author = "fpm maintainers"
 maintainer = ""

src/fpm_command_line.f90

@@ -235,7 +235,7 @@ subroutine get_command_line_settings(cmd_settings)
         end select
         unix = os_is_unix(os)
         version_text = [character(len=80) :: &
-         &  'Version:     0.7.0, alpha',                               &
+         &  'Version:     0.8.0, alpha',                               &
          &  'Program:     fpm(1)',                                     &
          &  'Description: A Fortran package manager and build system', &
          &  'Home Page:   https://github.com/fortran-lang/fpm',        &