chore: upgrade node to LTS 20

[danisharora099]

Problem

Node upgraded LTS from 18 to 20

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku node	86.5 KB (-0.11% 🔽)	1.8 s (-0.11% 🔽)	3.4 s (+31.46% 🔺)	5.1 s
Waku Simple Light Node	154.2 KB (+0.05% 🔺)	3.1 s (+0.05% 🔺)	2 s (-33.39% 🔽)	5.1 s
ECIES encryption	22.83 KB (0%)	457 ms (0%)	798 ms (-39.26% 🔽)	1.3 s
Symmetric encryption	22.33 KB (0%)	447 ms (0%)	1.2 s (-0.4% 🔽)	1.7 s
DNS discovery	72.27 KB (+0.01% 🔺)	1.5 s (+0.01% 🔺)	2.2 s (-28.48% 🔽)	3.7 s
Peer Exchange discovery	73.75 KB (-0.06% 🔽)	1.5 s (-0.06% 🔽)	2.1 s (-5.06% 🔽)	3.5 s
Local Peer Cache Discovery	67.57 KB (+0.01% 🔺)	1.4 s (+0.01% 🔺)	2 s (-17.68% 🔽)	3.4 s
Privacy preserving protocols	38.91 KB (-0.06% 🔽)	779 ms (-0.06% 🔽)	795 ms (-31.37% 🔽)	1.6 s
Waku Filter	81.07 KB (+0.09% 🔺)	1.7 s (+0.09% 🔺)	1.4 s (-51.23% 🔽)	3 s
Waku LightPush	78.59 KB (-0.01% 🔽)	1.6 s (-0.01% 🔽)	2.5 s (+16.63% 🔺)	4.1 s
History retrieval protocols	79.1 KB (+0.1% 🔺)	1.6 s (+0.1% 🔺)	2.6 s (-18.65% 🔽)	4.2 s
Deterministic Message Hashing	7.31 KB (0%)	147 ms (0%)	161 ms (-43.83% 🔽)	307 ms

[weboko]

finally!