Update env variables for CircleCi

[ijjk]

This got dropped off the BrowserStack PR when reverting so it just ran with chromedriver on merge

[github-actions]

Stats from current PR

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	zeit/next.js canary	ijjk/next.js add/ie-test-env	Change
Build Duration	12.2s	12.2s	✓
Client _app Size	3.03 kB	3.03 kB	✓
Client _app gzip Size	1.29 kB	1.29 kB	✓
Client _error Size	8.43 kB	8.43 kB	✓
Client _error gzip Size	3.23 kB	3.23 kB	✓
Client pages/index Size	298 B	298 B	✓
Client pages/index gzip Size	235 B	235 B	✓
Client pages/link Size	3.31 kB	3.31 kB	✓
Client pages/link gzip Size	1.5 kB	1.5 kB	✓
Client pages/routerDirect Size	426 B	426 B	✓
Client pages/routerDirect gzip Size	304 B	304 B	✓
Client pages/withRouter Size	408 B	408 B	✓
Client pages/withRouter gzip Size	293 B	293 B	✓
Client main Size	21.7 kB	21.7 kB	✓
Client main gzip Size	7.16 kB	7.16 kB	✓
Client commons Size	183 kB	183 kB	✓
Client commons gzip Size	59.5 kB	59.5 kB	✓
Client webpack Size	1.49 kB	1.49 kB	✓
Client webpack gzip Size	774 B	774 B	✓
Base Rendered Size	1.3 kB	1.3 kB	✓
Build Dir Size	345 kB	345 kB	✓
Average Memory Usage	128 MB	128 MB	✓
Max Memory Usage	162 MB	168 MB	⚠️ +6.25 MB
Average CPU Usage	93.65%	93.61%	-0.04%
Max CPU Usage	110%	111.11%	⚠️ +1.11%
node_modules Size	42.6 MB	42.6 MB	✓

Click to expand serverless stats

	zeit/next.js canary	ijjk/next.js add/ie-test-env	Change
Build Duration	15.4s	15.6s	⚠️ +188ms
Client _app Size	3.03 kB	3.03 kB	✓
Client _app gzip Size	1.29 kB	1.29 kB	✓
Client _error Size	8.43 kB	8.43 kB	✓
Client _error gzip Size	3.23 kB	3.23 kB	✓
Client pages/index Size	298 B	298 B	✓
Client pages/index gzip Size	235 B	235 B	✓
Client pages/link Size	3.31 kB	3.31 kB	✓
Client pages/link gzip Size	1.5 kB	1.5 kB	✓
Client pages/routerDirect Size	426 B	426 B	✓
Client pages/routerDirect gzip Size	304 B	304 B	✓
Client pages/withRouter Size	408 B	408 B	✓
Client pages/withRouter gzip Size	293 B	293 B	✓
Client main Size	21.7 kB	21.7 kB	✓
Client main gzip Size	7.16 kB	7.16 kB	✓
Client commons Size	183 kB	183 kB	✓
Client commons gzip Size	59.5 kB	59.5 kB	✓
Client webpack Size	1.49 kB	1.49 kB	✓
Client webpack gzip Size	774 B	774 B	✓
Serverless pages/link Size	221 kB	221 kB	✓
Serverless pages/link gzip Size	58 kB	58 kB	✓
Serverless pages/index Size	216 kB	216 kB	✓
Serverless pages/index gzip Size	56.8 kB	56.8 kB	✓
Serverless pages/_error Size	218 kB	218 kB	✓
Serverless pages/_error gzip Size	56.7 kB	56.7 kB	✓
Serverless pages/routerDirect Size	217 kB	217 kB	✓
Serverless pages/routerDirect gzip Size	56.7 kB	56.7 kB	✓
Serverless pages/withRouter Size	217 kB	217 kB	✓
Serverless pages/withRouter gzip Size	56.8 kB	56.8 kB	✓
Build Dir Size	1.31 MB	1.31 MB	✓
Average Memory Usage	140 MB	139 MB	-1.37 MB
Max Memory Usage	173 MB	207 MB	⚠️ +33.7 MB
Average CPU Usage	95.39%	95.61%	⚠️ +0.22%
Max CPU Usage	111.11%	111.11%	✓
node_modules Size	42.6 MB	42.6 MB	✓