Implement version string comparison (#186)

- allow semantic version matching

Author: awvwgk

fpm/src/fpm/manifest/package.f90

@@ -35,6 +35,7 @@ module fpm_manifest_package
     use fpm_error, only : error_t, fatal_error, syntax_error
     use fpm_toml, only : toml_table, toml_array, toml_key, toml_stat, get_value, &
         & len
+    use fpm_versioning, only : version_t, new_version
     implicit none
     private
 
@@ -47,6 +48,9 @@ module fpm_manifest_package
         !> Name of the package
         character(len=:), allocatable :: name
 
+        !> Package version
+        type(version_t) :: version
+
         !> Library meta data
         type(library_t), allocatable :: library
 
@@ -87,6 +91,7 @@ subroutine new_package(self, table, error)
 
         type(toml_table), pointer :: child, node
         type(toml_array), pointer :: children
+        character(len=:), allocatable :: version
         integer :: ii, nn, stat
 
         call check(table, error)
@@ -98,6 +103,10 @@ subroutine new_package(self, table, error)
            return
         end if
 
+        call get_value(table, "version", version, "0")
+        call new_version(self%version, version, error)
+        if (allocated(error)) return
+
         call get_value(table, "dependencies", child, requested=.false.)
         if (associated(child)) then
             call new_dependencies(self%dependency, child, error)