Require parens on dot apply

[johnynek]

this is the main syntax change in #1026. We can do this before changing the type-system to have FunctionN types.

[codecov-commenter]

Codecov Report

Merging #1027 (ae51abd) into master (ac20cad) will increase coverage by 0.13%. The diff coverage is 85.71%.

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@@            Coverage Diff             @@
##           master    #1027      +/-   ##
==========================================
+ Coverage   91.95%   92.09%   +0.13%     
==========================================
  Files          90       90              
  Lines        9381     9381              
  Branches     2172     2187      +15     
==========================================
+ Hits         8626     8639      +13     
+ Misses        755      742      -13     

Files Changed	Coverage Δ
...e/src/main/scala/org/bykn/bosatsu/MainModule.scala	78.22% <ø> (ø)
...src/main/scala/org/bykn/bosatsu/PackageError.scala	68.68% <0.00%> (ø)
.../src/main/scala/org/bykn/bosatsu/Declaration.scala	99.27% <100.00%> (+0.35%)	:arrow_up:
core/src/main/scala/org/bykn/bosatsu/Parser.scala	75.67% <100.00%> (+0.16%)	:arrow_up:

... and 6 files with indirect coverage changes