fix(ColorMatrix): Restore correct alpha for JS colorMatrix filter

[asturur]

Description

While touching the code i broke the ColorMatrix filter

In Action

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[github-actions]

Build Stats

file / KB (diff)	bundled	minified
fabric	922.430 (+0.048)	306.271 (+0.032)

[github-actions]

Coverage after merging broken-filter into master will be

85.04%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
fabric.ts	86.92%	20%	0%	95.79%	10, 144, 144, 144, 144, 144, 190, 190, 190, 190, 190, 31, 33, 33, 33, 33, 33–34, 34, 34, 34, 34, 39, 8
index.node.ts	14.29%	100%	0%	25%	23, 26, 29, 41, 44, 47
extensions/aligning_guidelines/util
basic.ts	100%	100%	100%	100%
extensions/data_updaters/origins
index.ts	97.50%	75%	100%	100%	22–23
src
ClassRegistry.ts	91.18%	64.29%	100%	97.92%	35, 56
Collection.ts	72.55%	33.85%	51.61%	84.67%	130, 153, 155–157, 159, 167, 169–170, 181, 197, 217, 228, 241, 243, 245, 252, 254, 263, 265, 270, 279, 281, 286–287, 302, 304, 306, 309–310, 327–328, 328–329, 333–334, 337–338, 338–344, 346–348, 350, 75, 99
CommonMethods.ts	88.57%	64.29%	83.33%	96%	50, 52, 9
EventTypeDefs.ts	100%	100%	100%	100%
Intersection.ts	81.42%	41.30%	73.33%	96.14%	105, 132–133, 166, 184–190, 228, 228, 237, 239, 289–291, 297, 297, 78, 80
Observable.ts	72.25%	44.19%	31.25%	86.36%	144, 153, 156, 168, 170, 172, 175, 41, 43, 68–70, 72, 76, 78, 80, 82–85, 87–91
Point.ts	84.95%	62%	44.12%	92.68%	104, 117, 148, 157, 179, 197, 206, 216, 225, 236–239, 259, 284–285, 294–297, 328, 341, 349, 359, 95
Shadow.ts	80.91%	13.04%	37.50%	90%	139, 139–140, 140–141, 143, 145–150, 159, 176, 176, 176, 176, 194, 194, 196–197, 197, 199, 206, 206, 223–230, 232, 232, 234–235
cache.ts	83.72%	45.45%	75%	90.14%	57, 59, 71–72, 74–77
config.ts	82.63%	20%	44.44%	94.20%	127, 135–136, 138–141, 143, 146–147, 151, 156, 156, 156, 156, 156, 156
constants.ts	100%	100%	100%	100%
typedefs.ts	100%	100%	100%	100%
src/LayoutManager
ActiveSelectionLayoutManager.ts	86.67%	76.92%	28.57%	100%
LayoutManager.ts	89.25%	65.48%	53.85%	99.31%	279, 344, 355
constants.ts	100%	100%	100%	100%
index.ts	48.57%	37.50%	80%	66.67%	1, 1, 1–2, 2, 2–3, 3, 3–4, 4, 4–5, 5, 5, 5–6
types.ts	100%	100%	100%	100%
src/LayoutManager/LayoutStrategies
ClipPathLayout.ts	71.05%	37.50%	100%	78.95%	39, 41–44, 46–48, 54, 57–58, 66–69
FitContentLayout.ts	100%	100%	100%	100%
FixedLayout.ts	85.71%	20%	100%	100%	23, 23
LayoutStrategy.ts	86.78%	57.14%	71.43%	97.67%	54, 73, 75, 88
utils.ts	62.90%	7.14%	100%	78.72%	28–32, 34–35, 39, 39–44, 47, 47, 47
src/Pattern
Pattern.ts	52.08%	2.86%	10%	63.08%	105–107, 113, 113–114, 117, 117–119, 119, 119–122, 130, 130–132, 132, 132, 132, 132, 132–138, 140–141, 143, 150, 150, 150, 150, 153–160, 160, 160–164, 174–175, 175, 175, 175–176, 176, 176–182, 182, 182, 182–183, 183, 183–188, 190–199, 203–206, 209–210, 212–214, 216–218, 218, 218–221, 33, 37
index.ts	50%	100%	100%	50%	2
types.ts	100%	100%	100%	100%
src/brushes
BaseBrush.ts	78.67%	8.33%	14.29%	88.55%	110, 114, 114–115, 122, 122, 122, 122, 124–125, 130, 135, 143, 146, 155, 155, 155, 155, 155–160, 99
CircleBrush.ts	52.10%	12.50%	12.50%	58.25%	100–108, 108–118, 122, 130–139, 55, 67, 69, 76, 76, 78–79, 79, 83, 85–86, 92–98
PatternBrush.ts	43.48%	0%	0%	53.57%	21, 21, 25–34, 36, 43, 43–44, 51–53, 53, 53–54, 60–64, 64, 64–69
PencilBrush.ts	40.14%	0%	0%	52.02%	103, 103, 116, 122, 122, 124, 129, 138–139, 146, 146, 146–147, 147, 147–152, 152, 152, 152, 152, 155–158, 167–169, 176, 176, 176, 176–177, 181–185, 185, 185, 185, 185, 188–205, 215, 224–232, 232, 235–238, 244, 244, 244–257, 257, 257–266, 274–276, 276, 276–280, 280, 280–299, 54, 54, 68, 68, 71, 71, 71–72, 75, 84, 84, 87, 87–88, 88, 88, 88, 91, 91, 91, 91–92, 92
SprayBrush.ts	51.67%	0%	0%	58.86%	100, 107, 107, 107, 107, 107–112, 118–120, 122, 128–135, 137–139, 141, 141, 141–148, 148, 152, 157, 162, 164, 169–170, 172, 180, 182, 185, 187, 195, 198–200, 200, 200–207, 207, 207–210, 212, 22, 22, 67, 85–87, 94–99
typedefs.ts	100%	100%	100%	100%
src/canvas
Canvas.ts	73.96%	31.86%	87.50%	86.11%	1012–1013, 1016, 1020–1021, 1024–1025, 1030, 1034–1035, 1048, 1078–1085, 1094, 1138, 1141, 1143, 1145, 1150, 1152, 1155, 1157, 117, 1218–1222, 1256, 1267, 1267, 1301–1305, 1329, 1329, 1329, 1332, 1349, 1349, 1353, 1359–1360, 1367, 1395–1424, 1424–1427, 1429, 1433, 1435–1436, 1438–1440, 1444, 1446, 1448–1450,