Revert "Make the default behaviour of cargo build match the documentation"

This reverts commit 3fc0715.

Author: infinity0

src/cargo/ops/cargo_compile.rs

@@ -422,19 +422,15 @@ impl<'a> CompileFilter<'a> {
 
     pub fn need_dev_deps(&self) -> bool {
         match *self {
-            CompileFilter::Default { .. } => false,
+            CompileFilter::Default { .. } => true,
             CompileFilter::Only { examples, tests, benches, .. } =>
                 examples.is_specific() || tests.is_specific() || benches.is_specific()
         }
     }
 
     pub fn matches(&self, target: &Target) -> bool {
         match *self {
-            CompileFilter::Default { .. } => match *target.kind() {
-                TargetKind::Bin => true,
-                TargetKind::Lib(..) => true,
-                _ => false,
-            },
+            CompileFilter::Default { .. } => true,
             CompileFilter::Only { lib, bins, examples, tests, benches, .. } => {
                 let rule = match *target.kind() {
                     TargetKind::Bin => bins,