message: Do not require `bc` to run `run_dev.sh`
diff: @@ -9,8 +9,8 @@ CHAINSPEC=$(mktemp -t chainspec_XXXXXXXX --suffix .toml)
  TRUSTED_HASH="${TRUSTED_HASH:-}"
  OFFSET="${OFFSET:-30}"
  TIMESTAMP=${GENESIS_TIMESTAMP:-$(date '+%s000' -d "+$OFFSET sec")}
  -echo "GENESIS_TIMESTAMP="$TIMESTAMP
  -date -d @$(echo "$TIMESTAMP/1000" | bc)
  +echo "GENESIS_TIMESTAMP=${TIMESTAMP}"
  +date -d @$(($TIMESTAMP/1000))
  # Build the node first, so that `sleep` in the loop has an effect.
  cargo build -p casper-node
  