Bumps [ejs](https://github.com/mde/ejs) from 3.1.3 to 3.1.8.
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/main/CHANGELOG.md)
- [Commits](https://github.com/mde/ejs/compare/v3.1.3...v3.1.8)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

```
nCPU: 4, nLeafs: 10000
	asmtree.Add loop:	1m33.393613916s
	asmtree.AddBatch:	480.164271ms
	gravitontree.Add loop:	10.127451689s
	gravitontree.AddBatch:	141.29108ms
	arbo.Add loop:		1.16466211s
	arbo.AddBatch:		97.870759ms

nCPU: 8, nLeafs: 10000
	asmtree.Add loop:	24.538163095s
	asmtree.AddBatch:	194.14454ms
	gravitontree.Add loop:	6.150883978s
	gravitontree.AddBatch:	90.742666ms
	arbo.Add loop:		600.259558ms
	arbo.AddBatch:		50.440291ms

---

nCPU: 4, nLeafs: 500000
	asmtree.AddBatch:	24.95076993s
	gravitontree.AddBatch:	11.768588412s
	arbo.AddBatch:		23.360363426s

nCPU: 8, nLeafs: 500000
	asmtree.Add loop:	(not executed)
	asmtree.AddBatch:	14.363474201s
	gravitontree.Add loop:	8m45.300930089s
	gravitontree.AddBatch:	7.377581508s
	arbo.Add loop:  	2m0.229851504s
	arbo.AddBatch:  	8.759028338s
```