Fix the version specifier for rand in Cargo.toml (= was missing)

tatsuya6502 · tatsuya6502 · commit 2f46d7e4712f · 2019-06-29T13:32:48.000+08:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -63,7 +63,7 @@ proconio-derive = "=0.1.5"
 # num = "=0.2.0"
 
 # RNG 疑似乱数生成器 (randファミリー)
-# rand = "0.6.5"
+# rand = "=0.6.5"
 # rand_chacha = "=0.1.1"
 # rand_pcg = "=0.1.2"
 
