Update package.json to only use dependencies
Update package.json to only use dependencies

- Remove dev dependencies
- Use the same version of node-sass and grunt-sass as GOV.UK elements
for Sass placeholder support (using the govuk frontend toolkit
placeholders for grid layout and clearing floated content).

DilwoarH/GDS-Prototype-DM-SavedSearch,joelanman/govuk_prototype_kit,dwpdigitaltech/digital-debt,companieshouse/ch-accounts-prototype,bencullimore/nhsers,mikieet/sm-prototype,dwpdigitaltech/digital-debt,antimega/cites-prototype,timpaul/ur_panel_prototype,samwake/hoddat-cofc-caseworking,dwpdigitaltech/hrt-prototype,nhsalpha/nhs_prototype_kit,davedark/proto-timeline,dwpdigitaltech/hrt-prototype,arminio/govuk_prototype_kit,abbott567/govuk_prototype_kit,davedark/proto-timeline,dwp-rti-prototype/rti-ux-new-prototype,hannalaakso/accessible-timeout-warning,nhsalpha/nhs_prototype_kit,nhsbsa/ppc-prototype,timpaul/registers-hackday,dwpdigitaltech/ejs-prototype,bencullimore/nhsers,timpaul/ur_panel_prototype,st3v3nhunt/prototype-ers,chrishanes/pvb_prisoner_proto,karlparton/my-govuk,mikieet/sm-3,Demwunz/esif-prototype,nhsbsa/ppc-prototype,mharrington/nhs_prototype_kit,DilwoarH/GDS-Prototype-DM-SavedSearch,gup-dwp/pip-prototype-v2,glancyea/tagtest,jeremygillies-ea/data_returns_prototype,joelanman/govuk_transaction_prototype_kit,karlparton/my-govuk,karlparton/my-govuk,chrishanes/pvb_prisoner_proto,timpaul/govuk_transaction_prototype_kit,antimega/performance-self-serve-prototype,alphagov/govuk_prototype_kit,alphagov/govuk_prototype_kit,st3v3nhunt/prototype-ers,rivalee/local-gov-links,danblundell/verify-local-patterns,tsmorgan/marx,Demwunz/esif-prototype,gavinwye/govuk_prototype_kit,nhsalpha/nhs_prototype_kit,OrcaTom/dwp_contentpatterns,kenmaddison-scc/verify-local-patterns,samwake/hoddat-cofc-caseworking,timpaul/nhs_prototype_kit,quis/notify-public-research-prototype,joelanman/govuk_transaction_prototype_kit,DilwoarH/GDS-Prototype-DM-SavedSearch,BucksCountyCouncil/verify-local-patterns,BucksCountyCouncil/verify-local-patterns,jeremygillies-ea/data_returns_prototype,antimega/cites-prototype,jamesarice/DPSS,hannalaakso/accessible-timeout-warning,OrcaTom/dwp_contentpatterns,quis/notify-public-research-prototype,nhsalpha/nhs_prototype_kit,benjeffreys/hmcts-idam-proto,benjeffreys/hmcts-idam-proto,rivalee/licensing-prototype,arminio/govuk_prototype_kit,mikieet/sm-3,dwpdigitaltech/ejs-prototype,paulpod/invgov,jeremygillies-ea/data_returns_prototype,glancyea/tagtest,UKHomeOffice/ReportTerroristMaterialPrototype,joelanman/govuk_prototype_kit,tsmorgan/marx,arminio/govuk_prototype_kit,mikieet/sm-prototype,LandRegistry/dmp-prototype,dwp-rti-prototype/rti-ux-new-prototype,dwpdigitaltech/ejs-prototype,alphagov/govuk_prototype_kit,danblundell/verify-local-patterns,timpaul/nhs_prototype_kit,UKHomeOffice/ReportTerroristMaterialPrototype,gup-dwp/pip-prototype-v2,st3v3nhunt/prototype-ers,tsmorgan/jsa-complaints,joelanman/govuk_prototype_kit,jamesarice/DPSS,timpaul/GOVUKCountrySelector,bencullimore/nhsers,Demwunz/esif-prototype,timpaul/govuk_transaction_prototype_kit,BucksCountyCouncil/verify-local-patterns,bencullimore/nhsers,chrishanes/pvb_prisoner_proto,timpaul/nh_prototype_kit,quis/notify-public-research-prototype,benjeffreys/hmcts-idam-proto,dwpdigitaltech/hrt-prototype,glancyea/tagtest,samwake/hoddat-cofc-caseworking,OrcaTom/dwp_contentpatterns,PurpleBooth/govuk_prototype_kit,rivalee/local-gov-links,rivalee/licensing-prototype,PurpleBooth/govuk_prototype_kit,abbott567/govuk_prototype_kit,tsmorgan/marx,davedark/proto-timeline,abbott567/govuk_prototype_kit,tsmorgan/jsa-complaints,gup-dwp/pip-prototype-v2,mharrington/nhs_prototype_kit,antimega/performance-self-serve-prototype,hannalaakso/accessible-timeout-warning,mharrington/nhs_prototype_kit,timpaul/nh_prototype_kit,dwpdigitaltech/digital-debt,kenmaddison-scc/verify-local-patterns,danblundell/verify-local-patterns,timpaul/registers-hackday,dwp-rti-prototype/rti-ux-new-prototype,gavinwye/govuk_prototype_kit,paulpod/invgov,nhsbsa/ppc-prototype,paulpod/invgov,companieshouse/ch-accounts-prototype,timpaul/GOVUKCountrySelector,kenmaddison-scc/verify-local-patterns,LandRegistry/dmp-prototype,LandRegistry/dmp-prototype,st3v3nhunt/prototype-ers