fix(aws-lambda, nextjs-component): ensure we wait until lambda functio…

[dphang]

…ns are ready before using them

Fixes: #1976

[slsnextbot]

Handler Size Report

No changes to handler sizes.

Base Handler Sizes (kB) (commit ec19109)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1497,
            "Minified": 659
        },
        "Image Lambda": {
            "Standard": 1463,
            "Minified": 793
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1508,
            "Minified": 665
        },
        "Default Lambda V2": {
            "Standard": 1500,
            "Minified": 662
        },
        "API Lambda": {
            "Standard": 632,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1472,
            "Minified": 798
        },
        "Regeneration Lambda": {
            "Standard": 1164,
            "Minified": 538
        },
        "Regeneration Lambda V2": {
            "Standard": 1230,
            "Minified": 565
        }
    }
}

New Handler Sizes (kB) (commit a23d5d6)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1497,
            "Minified": 659
        },
        "Image Lambda": {
            "Standard": 1463,
            "Minified": 793
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1508,
            "Minified": 665
        },
        "Default Lambda V2": {
            "Standard": 1500,
            "Minified": 662
        },
        "API Lambda": {
            "Standard": 632,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1472,
            "Minified": 798
        },
        "Regeneration Lambda": {
            "Standard": 1164,
            "Minified": 538
        },
        "Regeneration Lambda V2": {
            "Standard": 1230,
            "Minified": 565
        }
    }
}

[codecov]

Codecov Report

Merging #1982 (a23d5d6) into master (ec19109) will increase coverage by 0.03%.
The diff coverage is 93.33%.

@@            Coverage Diff             @@
##           master    #1982      +/-   ##
==========================================
+ Coverage   83.81%   83.85%   +0.03%     
==========================================
  Files         101      102       +1     
  Lines        3608     3623      +15     
  Branches     1140     1142       +2     
==========================================
+ Hits         3024     3038      +14     
- Misses        572      573       +1     
  Partials       12       12              

Impacted Files	Coverage Δ
...rless-components/nextjs-component/src/component.ts	86.36% <ø> (ø)
...erless-components/aws-lambda/src/waitUntilReady.ts	92.85% <92.85%> (ø)
.../serverless-components/aws-lambda/src/component.ts	71.01% <100.00%> (+0.42%)	⬆️

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