Update TS and modernize build

[wycats]

No description provided.

[NullVoxPopuli]

daaaang

duration phase estimated improvement -300ms [-365ms to -243ms] OR -7.12% [-8.65% to -5.76%]
renderEnd phase estimated improvement -1ms [-1ms to 0ms] OR -3.16% [-7.84% to -0.6%]
render1000Items1End phase estimated improvement -20ms [-32ms to -14ms] OR -6.75% [-11.13% to -4.82%]
clearItems1End phase no difference [-2ms to 3ms]
render1000Items2End phase estimated improvement -24ms [-33ms to -15ms] OR -10.92% [-15.24% to -7.04%]
clearItems2End phase no difference [-1ms to 0ms]
render5000Items1End phase estimated improvement -107ms [-134ms to -84ms] OR -9.8% [-12.28% to -7.68%]
clearManyItems1End phase no difference [-4ms to 6ms]
render5000Items2End phase estimated improvement -70ms [-100ms to -50ms] OR -7.09% [-10.14% to -5.11%]
clearManyItems2End phase estimated regression +3ms [0ms to 16ms] OR +2.73% [0.39% to 16.63%]
render1000Items3End phase no difference [-27ms to 1ms]
append1000Items1End phase no difference [-34ms to 4ms]
append1000Items2End phase estimated improvement -15ms [-30ms to -2ms] OR -6.28% [-12.14% to -0.67%]
updateEvery10thItem1End phase no difference [-3ms to 0ms]
updateEvery10thItem2End phase no difference [0ms to 0ms]
selectFirstRow1End phase no difference [0ms to 0ms]
selectSecondRow1End phase estimated improvement -16ms [-17ms to 0ms] OR -31.13% [-33.62% to -0.59%]
removeFirstRow1End phase estimated regression +12ms [0ms to 16ms] OR +14.64% [0.36% to 19.61%]
removeSecondRow1End phase no difference [-8ms to 0ms]
swapRows1End phase no difference [0ms to 0ms]
swapRows2End phase no difference [0ms to 1ms]
clearItems4End phase no difference [-6ms to 1ms]
paint phase no difference [0ms to 1ms]

[wycats]

I'm going to close this as superseded by #1677 and anticipated follow-up work.