v1.0.0

What's new in 1.0.0

• Mixed positive/negative data is now auto-detected and rendered as a
  proportional split sparkline automatically — no flags required. Upward bars
  appear on top, downward bars below.
• All-negative data now renders as inverted (downward) bars automatically.
• New -n / --num-lines accepts three forms: a positive integer (total rows,
  allocated proportionally), 'auto' (smallest proportional row count), or
  'up:down' (explicit per-side layout). Integer and auto modes use a shared
  max scale; up:down uses independent per-side scaling.
• New --zero flag: 'up' (default) places zeros on the positive baseline;
  'none' omits zeros from both sides.
• Removed inverted=True / -i/--inverted and split=True / -s/--split from the
  public API. Inverted rendering is now an internal implementation detail.
• Removed -v/--verbose CLI flag and verbose= parameter (were no-ops since
  introduction; never produced any output).
• Proportional row allocation: up_rows/total == pos_max/range, so the zero
  line stays meaningful as the visual boundary between halves.
• ANSI reverse video with complement block characters gives full 8-level
  resolution for downward bars. Falls back to top-fill Unicode characters
  (▔▀█) when NO_COLOR, ANSI_COLORS_DISABLED, or TERM=dumb is set.
• Fixed: color emphasis (-e) in mixed positive/negative sparklines is now
  evaluated against the original values, not the abs-converted partition.
  Conditions like "blue:lt:0" now correctly match negative bars.
• New index-slice form for -e/--emphasize: "color:[start:stop:step]" selects
  bars by position rather than value, using standard Python slice syntax
  (e.g. "red:[0:3]", "blue:[::2]", "yellow:[-1:]"). Value and slice
  expressions can be mixed freely.
• Fixed: --wrap with mixed positive/negative data now correctly interleaves
  the positive and negative rows per window, rather than emitting all positive
  windows followed by all negative windows.