import process Command explicitly in standard library child tests

Author: wsdt

tests/project/standard_library/decimal.rs

@@ -1,4 +1,5 @@
 //! Exact unsigned decimal source arithmetic; no machine-integer operand limit.
+use std::process::Command;
 use super::*;
 use semaprax::project::{ProjectExecutionOptions, ProjectExecutionOutcome};
 

tests/project/standard_library/process.rs

@@ -1,4 +1,5 @@
 //! Source-authored argv/cursor composition through all three process engines.
+use std::process::Command;
 use super::*;
 use semaprax::hosted_interpreter::HostedEnvironmentCommandInput;
 use semaprax::interpreter::CommandEvaluationOutcome;

tests/project/standard_library/testing.rs

@@ -1,4 +1,5 @@
 //! Byte assertions compose through ordinary owned Reader values and test codes.
+use std::process::Command;
 use semaprax::diagnostic::Diagnostic;
 
 use super::*;