Fixes array_key_exists warning when parsing a "DEFAULT FALSE" token

[shucon]

Fixes: #299

The issue was caused because the value of token FALSE became boolean instead of string.

Signed-off-by: Saksham Gupta shucon01@gmail.com

[codecov]

Codecov Report

Merging #314 into QA will decrease coverage by 0.02%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##                 QA     #314      +/-   ##
============================================
- Coverage     99.71%   99.69%   -0.03%     
- Complexity     1906     1908       +2     
============================================
  Files            63       63              
  Lines          4593     4598       +5     
============================================
+ Hits           4580     4584       +4     
- Misses           13       14       +1     

Impacted Files	Coverage Δ	Complexity Δ
src/Components/AlterOperation.php	98.83% <87.50%> (-1.17%)	32.00 <0.00> (+2.00)	⬇️

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[williamdes]

Could you add some phpunit tests to cover this cases ?

[shucon]

Hey, I've added a test but I'm not sure whether that's how it's supposed to be.

[ibennetch]

I think this LGTM. Thank you.