message: added new `cap` & `lineCap` props
diff: * AUTH: Brent Ely (https://github.com/gitbrent/)
  * DESC: Common test/demo slides for all library features
  * DEPS: Used by various demos (./demos/browser, ./demos/node, etc.)
  - * VER.: 3.11.0
  - * BLD.: 20220806
  + * VER.: 3.12.0
  + * BLD.: 20230116
  */
  import { BASE_TABLE_OPTS, BASE_TEXT_OPTS_L, BASE_TEXT_OPTS_R, FOOTER_TEXT_OPTS, IMAGE_PATHS, TESTMODE } from "./enums.mjs";
  @@ -890,8 +890,8 @@ function genSlide07(pptx) {
  valAxisMaxVal: 1,
  barDir: "bar",
  axisLabelFormatCode: "#%",
  - catGridLine: { color: "D8D8D8", style: "dash", size: 1 },
  - valGridLine: { color: "D8D8D8", style: "dash", size: 1 },
  + catGridLine: { color: "D8D8D8", style: "dash", size: 1, cap: "round" },
  + valGridLine: { color: "D8D8D8", style: "dash", size: 1, cap: "square" },
  catAxisLineShow: false,
  valAxisLineShow: false,
  barGrouping: "stacked",
  @@ -1018,6 +1018,7 @@ function genSlide10(pptx) {
  y: idx < 3 ? 0.5 : idx < 6 ? 2.85 : 5.1,
  w: 4.25,
  h: 2.25,
  + lineCap: 'round',
  lineDataSymbol: opt,
  lineDataSymbolSize: idx == 5 ? 9 : idx == 6 ? 12 : null,
  chartColors: COLORS_VIVID,
  