fix(lambda-at-edge): copy next-i18next files to regeneration handler

[dphang]

Fix for #1634

[slsnextbot]

Handler Size Report

No changes to handler sizes.

Base Handler Sizes (kB) (commit a56dd82)

{
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1253,
            "Minified": 448
        },
        "API Lambda": {
            "Standard": 99,
            "Minified": 44
        },
        "Image Lambda": {
            "Standard": 918,
            "Minified": 368
        },
        "Regeneration Lambda": {
            "Standard": 645,
            "Minified": 235
        }
    }
}

New Handler Sizes (kB) (commit ca332bf)

{
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1253,
            "Minified": 448
        },
        "API Lambda": {
            "Standard": 99,
            "Minified": 44
        },
        "Image Lambda": {
            "Standard": 918,
            "Minified": 368
        },
        "Regeneration Lambda": {
            "Standard": 645,
            "Minified": 235
        }
    }
}

[codecov]

Codecov Report

Merging #1653 (ca332bf) into master (a56dd82) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1653   +/-   ##
=======================================
  Coverage   84.22%   84.23%           
=======================================
  Files          98       98           
  Lines        3442     3444    +2     
  Branches     1020     1022    +2     
=======================================
+ Hits         2899     2901    +2     
  Misses        483      483           
  Partials       60       60           

Impacted Files	Coverage Δ
packages/libs/lambda-at-edge/src/build.ts	96.66% <100.00%> (ø)
...-at-edge/src/build/third-party/integration-base.ts	100.00% <100.00%> (ø)
...mbda-at-edge/src/build/third-party/next-i18next.ts	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a56dd82...ca332bf. Read the comment docs.