Upgrade rand, dirs

cli/Cargo.toml

@@ -24,7 +24,7 @@ difference = "2.0"
 lazy_static = "1.2.0"
 smallbitvec = "2.3.0"
 clap = "2.32"
-dirs = "1.0.2"
+dirs = "2.0.2"
 libloading = "0.5"
 once_cell = "0.1.8"
 serde = "1.0"
@@ -52,6 +52,6 @@ version = "0.4.6"
 features = ["std"]
 
 [dev-dependencies]
-rand = "0.6.4"
+rand = "0.7.0"
 spin = "0.5"
 tempfile = "3"

cli/src/tests/helpers/random.rs

@@ -1,15 +1,15 @@
 use rand::distributions::Alphanumeric;
-use rand::prelude::{Rng, SeedableRng, SmallRng};
+use rand::prelude::{Rng, SeedableRng, StdRng};
 
 const OPERATORS: &[char] = &[
     '+', '-', '<', '>', '(', ')', '*', '/', '&', '|', '!', ',', '.',
 ];
 
-pub struct Rand(SmallRng);
+pub struct Rand(StdRng);
 
 impl Rand {
     pub fn new(seed: usize) -> Self {
-        Rand(SmallRng::seed_from_u64(seed as u64))
+        Rand(StdRng::seed_from_u64(seed as u64))
     }
 
     pub fn unsigned(&mut self, max: usize) -> usize {